Matt Caswell [Wed, 14 Sep 2016 12:27:59 +0000 (13:27 +0100)]
Fix a missing NULL check in dsa_builtin_paramgen
We should check the last BN_CTX_get() call to ensure that it isn't NULL
before we try and use any of the allocated BIGNUMs.
Issue reported by Shi Lei.
Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit
1ff7425d6130380bb00d3e64739633a4b21b11a3)
Richard Levitte [Tue, 20 Sep 2016 19:41:58 +0000 (21:41 +0200)]
RT4669: dgst can only sign/verify one file
Check arg count and print an error message.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Marcus Meissner [Tue, 6 Sep 2016 09:01:21 +0000 (11:01 +0200)]
initialize the RSA struct to 0.
This helps with program code linked against static builds accessing a uninitialized ->engine pointer.
CLA: none; trivial
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1540)
Dr. Stephen Henson [Thu, 15 Sep 2016 22:49:41 +0000 (23:49 +0100)]
update default dependencies
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Thu, 15 Sep 2016 19:53:09 +0000 (20:53 +0100)]
Revert "Abort on unrecognised warning alerts"
This reverts commit
15d81749322c3498027105f8ee44e8c25479d475.
There were some unexpected side effects to this commit, e.g. in SSLv3 a
warning alert gets sent "no_certificate" if a client does not send a
Certificate during Client Auth. With the above commit this causes the
connection to abort, which is incorrect. There may be some other edge cases
like this so we need to have a rethink on this.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Richard Levitte [Wed, 14 Sep 2016 21:37:53 +0000 (23:37 +0200)]
Finally, make sure vms_term_sock.c is built
Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Thu, 15 Sep 2016 07:45:57 +0000 (09:45 +0200)]
Refactor to avoid unnecessary preprocessor logic
Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Wed, 14 Sep 2016 18:54:30 +0000 (20:54 +0200)]
Reformat to fit OpenSSL source code standards
Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Wed, 14 Sep 2016 18:53:06 +0000 (20:53 +0200)]
Remove entirely unnecessary pointer size guards
Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Wed, 14 Sep 2016 18:52:03 +0000 (20:52 +0200)]
Add copyright and license on apps/vms_term_sock.[ch]
Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Wed, 3 Aug 2016 19:16:43 +0000 (21:16 +0200)]
VSI submission: redirect terminal input through socket
This is needed, because on VMS, select() can only be used on sockets. being
able to use select() on all kinds of file descriptors is unique to Unix.
So, the solution for VMS is to create a layer that translates input from
standard input to socket communication.
Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Dr. Stephen Henson [Wed, 14 Sep 2016 22:42:55 +0000 (23:42 +0100)]
Fix memory leak on realloc error.
Backport leak fix from master branch.
Thanks to Shi Lei (Gear Team, Qihoo 360 Inc.) for reporting this bug.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Dr. Stephen Henson [Wed, 14 Sep 2016 22:54:12 +0000 (23:54 +0100)]
Fix memory leak on error.
Thanks to Shi Lei (Gear Team, Qihoo 360 Inc.) for reporting this bug.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Tue, 6 Sep 2016 15:39:35 +0000 (17:39 +0200)]
VMS: only use _realloc32 with /POINTER_SIZE=32
This fixes the following error when building with no particular pointer size
is specified (implied 32 bit):
static void *(*realloc_func) (void *, size_t) = realloc;
................................................^
%CC-E-UNDECLARED, In the initializer for realloc_func, "_realloc32" is not declared.
at line number 93 in file DEV:[OPENSSL102.crypto]mem.c;1
Reviewed-by: Andy Polyakov <appro@openssl.org>
Matt Caswell [Thu, 8 Sep 2016 13:32:27 +0000 (14:32 +0100)]
Add some sanity checks around usage of t_fromb64()
The internal SRP function t_fromb64() converts from base64 to binary. It
does not validate that the size of the destination is sufficiently large -
that is up to the callers. In some places there was such a check, but not
in others.
Add an argument to t_fromb64() to provide the size of the destination
buffer and validate that we don't write too much data. Also add some sanity
checks to the callers where appropriate.
With thanks to Shi Lei for reporting this issue.
Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit
73f0df8331910d6726d45ecaab12bd93cc48b4e2)
Matt Caswell [Mon, 12 Sep 2016 10:04:51 +0000 (11:04 +0100)]
Abort on unrecognised warning alerts
A peer continually sending unrecognised warning alerts could mean that we
make no progress on a connection. We should abort rather than continuing if
we receive an unrecognised warning alert.
Thanks to Shi Lei for reporting this issue.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Mon, 12 Sep 2016 14:29:39 +0000 (16:29 +0200)]
Add enginesdir to libcrypto.pc pkg-config file
Reviewed-by: Rich Salz <rsalz@openssl.org>
Dr. Stephen Henson [Thu, 8 Sep 2016 14:10:32 +0000 (15:10 +0100)]
Fix memory leak on error.
Backport leak fix from master branch.
Thanks to Shi Lei for reporting this bug.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Rich Salz [Fri, 9 Sep 2016 16:17:47 +0000 (12:17 -0400)]
Make update
Reviewed-by: Andy Polyakov <appro@openssl.org>
Richard Levitte [Thu, 8 Sep 2016 21:39:26 +0000 (23:39 +0200)]
If errno is ENXIO in BSS_new_file(), set BIO_R_NO_SUCH_FILE
VMS sets that errno when the device part of a file spec is malformed
or a logical name that doesn't exist.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
e82e2186e93e9a678dd8c0c5ba084d21d27d4d62)
David Woodhouse [Wed, 7 Sep 2016 15:53:18 +0000 (16:53 +0100)]
Avoid EVP_PKEY_cmp() crash on EC keys without public component
Some hardware devices don't provide the public EC_POINT data. The only
way for X509_check_private_key() to validate that the key matches a
given certificate is to actually perform a sign operation and then
verify it using the public key in the certificate.
Maybe that can come later, as discussed in issue 1532. But for now let's
at least make it fail gracefully and not crash.
GH: 1532
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1547)
(cherry picked from commit
92ed7fa575a80955f3bb6efefca9bf576a953586)
Rich Salz [Mon, 5 Sep 2016 22:08:43 +0000 (18:08 -0400)]
Misc BN fixes
Never output -0; make "negative zero" an impossibility.
Do better checking on BN_rand top/bottom requirements and #bits.
Update doc.
Ignoring trailing garbage in BN_asc2bn.
Port this commit from boringSSL: https://boringssl.googlesource.com/boringssl/+/
899b9b19a4cd3fe526aaf5047ab9234cdca19f7d%5E!/
Ensure |BN_div| never gives negative zero in the no_branch code.
Have |bn_correct_top| fix |bn->neg| if the input is zero so that we
don't have negative zeros lying around.
Thanks to Brian Smith for noticing.
Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit
01c09f9fde5793e0b3712d602b02e2aed4908e8d)
(Some manual work required)
Andy Polyakov [Sat, 27 Aug 2016 18:47:57 +0000 (20:47 +0200)]
crypto/bn/*: x86[_64] division instruction doesn't handle constants, change constraint from 'g' to 'r'.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit
68b4a6e91f5acd42489bb9d1c580acc5ae457cad)
Matt Caswell [Tue, 30 Aug 2016 14:06:01 +0000 (15:06 +0100)]
Ensure the CertStatus message adds a DTLS message header where needed
The function tls_construct_cert_status() is called by both TLS and DTLS
code. However it only ever constructed a TLS message header for the message
which obviously failed in DTLS.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Matt Caswell [Fri, 26 Aug 2016 14:14:24 +0000 (15:14 +0100)]
SRP_create_verifier does not check for NULL before OPENSSL_cleanse
OPENSSL_cleanse() does not validate its input parameter for NULL so
SRP_create_verifier() should do so instead. Otherwise a segfault will
result.
Alternative solution to GitHub PR#1006
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Fri, 26 Aug 2016 07:59:55 +0000 (09:59 +0200)]
Improve the definition of STITCHED_CALL in e_rc4_hmac_md5.c
The definition of STITCHED_CALL relies on OPENSSL_NO_ASM. However,
when a configuration simply lacks the assembler implementation for RC4
(which is where we have implemented the stitched call), OPENSSL_NO_ASM
isn't implemented. Better, then, to rely on specific macros that
indicated that RC4 (and MD5) are implemented in assembler.
For this to work properly, we must also make sure Configure adds the
definition of RC4_ASM among the C flags.
(partly cherry picked from commit
216e8d91033d237880cff7da0d02d46d47bae41b)
Reviewed-by: Andy Polyakov <appro@openssl.org>
FdaSilvaYY [Mon, 4 Apr 2016 22:33:41 +0000 (00:33 +0200)]
Fix a few leaks in X509_REQ_to_X509.
Fix a possible leak on NETSCAPE_SPKI_verify failure.
Backport of
0517538d1a39bc
Backport of
f6c006ea76304a
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
David Woodhouse [Wed, 3 Aug 2016 17:25:07 +0000 (18:25 +0100)]
Add basic test for Cisco DTLS1_BAD_VER and record replay handling
(Modified for 1.0.2 by adding selected PACKET_xx() functions and PRF, and
subsequent cleanup from commit
eb633d03fe2db3666840dee8d0a2dbe491672dfc)
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
40425899200a3dea9ec3684d3eb80bcf50c99baf)
David Woodhouse [Tue, 2 Aug 2016 21:54:46 +0000 (22:54 +0100)]
Fix ubsan 'left shift of negative value -1' error in satsub64be()
Baroque, almost uncommented code triggers behaviour which is undefined
by the C standard. You might quite reasonably not care that the code was
broken on ones-complement machines, but if we support a ubsan build then
we need to at least pretend to care.
It looks like the special-case code for 64-bit big-endian is going to
behave differently (and wrongly) on wrap-around, because it treats the
values as signed. That seems wrong, and allows replay and other attacks.
Surely you need to renegotiate and start a new epoch rather than
wrapping around to sequence number zero again?
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
2e94723c1b5d8ab974645e83de90b248265af3cd)
David Woodhouse [Fri, 8 Jul 2016 19:46:07 +0000 (20:46 +0100)]
Fix SSL_export_keying_material() for DTLS1_BAD_VER
Commit
d8e8590e ("Fix missing return value checks in SCTP") made the
DTLS handshake fail, even for non-SCTP connections, if
SSL_export_keying_material() fails. Which it does, for DTLS1_BAD_VER.
Apply the trivial fix to make it succeed, since there's no real reason
why it shouldn't even though we never need it.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
c8a18468caef4d62778381be0acdadc8a88d6e51)
Matt Caswell [Fri, 26 Aug 2016 12:11:17 +0000 (13:11 +0100)]
Fix the no-tls1 option
This also fixes no-tls which is an alias for no-tls1 in 1.0.2 (it is not
possible to do no-tls1_1 or no-tls1_2 in 1.0.2).
Because it is not possible to disable TLS1.1 or TLS1.2 it no longer follows
that disabling TLS1.0 should force the disabling of tlsext.
Also a few missing ifdef guards.
GitHub Iusse#935
Reviewed-by: Rich Salz <rsalz@openssl.org>
Andy Polyakov [Wed, 24 Aug 2016 15:13:09 +0000 (17:13 +0200)]
ec/asm/ecp_nistz256-x86_64.pl: /cmovb/cmovc/ as nasm doesn't recognize cmovb.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
d3034d31e7c04b334dd245504dd4f56e513ca115)
Andy Polyakov [Fri, 19 Aug 2016 21:16:04 +0000 (23:16 +0200)]
ec/ecp_nistz256: harmonize is_infinity with ec_GFp_simple_is_at_infinity.
RT#4625
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
e3057a57caf4274ea1fb074518e4714059dfcabf)
Andy Polyakov [Sat, 20 Aug 2016 20:04:21 +0000 (22:04 +0200)]
ec/asm/ecp_nistz256-x86_64.pl: addition to perform stricter reduction.
Addition was not preserving inputs' property of being fully reduced.
Thanks to Brian Smith for reporting this.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
b62b2454fadfccaf5e055a1810d72174c2633b8f)
Todd Short [Thu, 26 May 2016 17:49:36 +0000 (13:49 -0400)]
Always use session_ctx when removing a session
Sessions are stored on the session_ctx, which doesn't change after
SSL_set_SSL_CTX().
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Dr. Stephen Henson [Fri, 19 Aug 2016 22:28:29 +0000 (23:28 +0100)]
Avoid overflow in MDC2_Update()
Thanks to Shi Lei for reporting this issue.
CVE-2016-6303
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
55d83bf7c10c7b205fffa23fa7c3977491e56c07)
Rich Salz [Thu, 18 Aug 2016 13:26:52 +0000 (09:26 -0400)]
SWEET32 (CVE-2016-2183): Move DES from HIGH to MEDIUM
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
Matt Caswell [Wed, 24 Aug 2016 08:23:14 +0000 (09:23 +0100)]
Fix no-ec
Use a ciphersuite in dtlstest that is not affected by no-* options.
Backport of commit
fe34735c19.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Dr. Stephen Henson [Tue, 23 Aug 2016 17:14:54 +0000 (18:14 +0100)]
Sanity check ticket length.
If a ticket callback changes the HMAC digest to SHA512 the existing
sanity checks are not sufficient and an attacker could perform a DoS
attack with a malformed ticket. Add additional checks based on
HMAC size.
Thanks to Shi Lei for reporting this bug.
CVE-2016-6302
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Fri, 19 Aug 2016 14:53:54 +0000 (16:53 +0200)]
mk1mf: dtlstest needs ssltestlib, include it with a hack
We don't really have a mechanism to include other object files into a given
test program. For now, a simple hack in mk1mf.pl will do.
RT#4653
Reviewed-by: Rich Salz <rsalz@openssl.org>
David Benjamin [Sat, 20 Aug 2016 17:55:17 +0000 (13:55 -0400)]
Don't check for malloc failure twice.
a03f81f4ead24c234dc26e388d86a352685f3948 added a malloc failure check to
EVP_PKEY_keygen, but there already was one.
Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Rich Salz <rsalz@openssl.org>
GH: #1473
Kazuki Yamaguchi [Sun, 21 Aug 2016 17:36:36 +0000 (02:36 +0900)]
Fix overflow check in BN_bn2dec()
Fix an off by one error in the overflow check added by
07bed46f332fc
("Check for errors in BN_bn2dec()").
Reviewed-by: Stephen Henson <steve@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
099e2968ed3c7d256cda048995626664082b1b30)
Rich Salz [Mon, 22 Aug 2016 15:25:12 +0000 (11:25 -0400)]
RT2676: Reject RSA eponent if even or 1
Also, re-organize RSA check to use goto err.
Try all checks, not just stopping at first (via Richard Levitte)
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
464d59a5bb5811f7671e2bd37f41d610606b829d)
Richard Levitte [Mon, 22 Aug 2016 08:17:27 +0000 (10:17 +0200)]
VMS: Use strict refdef extern model when building library object files
Most of the time, this isn't strictly needed. However, in the default
extern model (called relaxed refdef), symbols are treated as weak
common objects unless they are initialised. The librarian doesn't
include weak symbols in the (static) libraries, which renders them
invisible when linking a program with said those libraries, which is a
problem at times.
Using the strict refdef model is much more like standard C on all
other platforms, and thereby avoid the issues that come with the
relaxed refdef model.
Note: this doesn't apply to VAX C. It's possible that this will make
OpenSSL building with VAX C difficult some time in the future if it
isn't already. However, VAX C is a very old compiler that we don't
expect to see too often, as DEC C (a.k.a VMS C) should have replaced
it a long time ago.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Mon, 22 Aug 2016 11:35:27 +0000 (13:35 +0200)]
GOST: rearrange code so it's more like C rather than C++
Some builds fail otherwise.
Reviewed-by: Matt Caswell <matt@openssl.org>
Richard Levitte [Mon, 22 Aug 2016 13:22:17 +0000 (15:22 +0200)]
Make 'openssl req -x509' more equivalent to 'openssl req -new'
The following would fail, or rather, freeze:
openssl genrsa -out rsa2048.pem 2048
openssl req -x509 -key rsa2048.pem -keyform PEM -out cert.pem
In that case, the second command wants to read a certificate request
from stdin, because -x509 wasn't fully flagged as being for creating
something new. This changes makes it fully flagged.
RT#4655
Reviewed-by: Andy Polyakov <appro@openssl.org>
Andy Polyakov [Wed, 16 Mar 2016 22:33:53 +0000 (23:33 +0100)]
bn/asm/x86[_64]-mont*.pl: implement slightly alternative page-walking.
Original strategy for page-walking was adjust stack pointer and then
touch pages in order. This kind of asks for double-fault, because
if touch fails, then signal will be delivered to frame above adjusted
stack pointer. But touching pages prior adjusting stack pointer would
upset valgrind. As compromise let's adjust stack pointer in pages,
touching top of the stack. This still asks for double-fault, but at
least prevents corruption of neighbour stack if allocation is to
overstep the guard page.
Also omit predict-non-taken hints as they reportedly trigger illegal
instructions in some VM setups.
Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit
3ba1ef829cf3dd36eaa5e819258d90291c6a1027)
Richard Levitte [Mon, 22 Aug 2016 12:02:31 +0000 (14:02 +0200)]
ssltestlib: Tell compiler we don't care about the value when we don't
In mempacket_test_read(), we've already fetched the top value of the
stack, so when we shift the stack, we don't care for the value. The
compiler needs to be told, or it will complain harshly when we tell it
to be picky.
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
1c288878af42650fbda911b702ae7b551a545b1c)
Matt Caswell [Thu, 30 Jun 2016 14:06:27 +0000 (15:06 +0100)]
Prevent DTLS Finished message injection
Follow on from CVE-2016-2179
The investigation and analysis of CVE-2016-2179 highlighted a related flaw.
This commit fixes a security "near miss" in the buffered message handling
code. Ultimately this is not currently believed to be exploitable due to
the reasons outlined below, and therefore there is no CVE for this on its
own.
The issue this commit fixes is a MITM attack where the attacker can inject
a Finished message into the handshake. In the description below it is
assumed that the attacker injects the Finished message for the server to
receive it. The attack could work equally well the other way around (i.e
where the client receives the injected Finished message).
The MITM requires the following capabilities:
- The ability to manipulate the MTU that the client selects such that it
is small enough for the client to fragment Finished messages.
- The ability to selectively drop and modify records sent from the client
- The ability to inject its own records and send them to the server
The MITM forces the client to select a small MTU such that the client
will fragment the Finished message. Ideally for the attacker the first
fragment will contain all but the last byte of the Finished message,
with the second fragment containing the final byte.
During the handshake and prior to the client sending the CCS the MITM
injects a plaintext Finished message fragment to the server containing
all but the final byte of the Finished message. The message sequence
number should be the one expected to be used for the real Finished message.
OpenSSL will recognise that the received fragment is for the future and
will buffer it for later use.
After the client sends the CCS it then sends its own Finished message in
two fragments. The MITM causes the first of these fragments to be
dropped. The OpenSSL server will then receive the second of the fragments
and reassemble the complete Finished message consisting of the MITM
fragment and the final byte from the real client.
The advantage to the attacker in injecting a Finished message is that
this provides the capability to modify other handshake messages (e.g.
the ClientHello) undetected. A difficulty for the attacker is knowing in
advance what impact any of those changes might have on the final byte of
the handshake hash that is going to be sent in the "real" Finished
message. In the worst case for the attacker this means that only 1 in
256 of such injection attempts will succeed.
It may be possible in some situations for the attacker to improve this such
that all attempts succeed. For example if the handshake includes client
authentication then the final message flight sent by the client will
include a Certificate. Certificates are ASN.1 objects where the signed
portion is DER encoded. The non-signed portion could be BER encoded and so
the attacker could re-encode the certificate such that the hash for the
whole handshake comes to a different value. The certificate re-encoding
would not be detectable because only the non-signed portion is changed. As
this is the final flight of messages sent from the client the attacker
knows what the complete hanshake hash value will be that the client will
send - and therefore knows what the final byte will be. Through a process
of trial and error the attacker can re-encode the certificate until the
modified handhshake also has a hash with the same final byte. This means
that when the Finished message is verified by the server it will be
correct in all cases.
In practice the MITM would need to be able to perform the same attack
against both the client and the server. If the attack is only performed
against the server (say) then the server will not detect the modified
handshake, but the client will and will abort the connection.
Fortunately, although OpenSSL is vulnerable to Finished message
injection, it is not vulnerable if *both* client and server are OpenSSL.
The reason is that OpenSSL has a hard "floor" for a minimum MTU size
that it will never go below. This minimum means that a Finished message
will never be sent in a fragmented form and therefore the MITM does not
have one of its pre-requisites. Therefore this could only be exploited
if using OpenSSL and some other DTLS peer that had its own and separate
Finished message injection flaw.
The fix is to ensure buffered messages are cleared on epoch change.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Thu, 30 Jun 2016 12:17:08 +0000 (13:17 +0100)]
Fix DTLS buffered message DoS attack
DTLS can handle out of order record delivery. Additionally since
handshake messages can be bigger than will fit into a single packet, the
messages can be fragmented across multiple records (as with normal TLS).
That means that the messages can arrive mixed up, and we have to
reassemble them. We keep a queue of buffered messages that are "from the
future", i.e. messages we're not ready to deal with yet but have arrived
early. The messages held there may not be full yet - they could be one
or more fragments that are still in the process of being reassembled.
The code assumes that we will eventually complete the reassembly and
when that occurs the complete message is removed from the queue at the
point that we need to use it.
However, DTLS is also tolerant of packet loss. To get around that DTLS
messages can be retransmitted. If we receive a full (non-fragmented)
message from the peer after previously having received a fragment of
that message, then we ignore the message in the queue and just use the
non-fragmented version. At that point the queued message will never get
removed.
Additionally the peer could send "future" messages that we never get to
in order to complete the handshake. Each message has a sequence number
(starting from 0). We will accept a message fragment for the current
message sequence number, or for any sequence up to 10 into the future.
However if the Finished message has a sequence number of 2, anything
greater than that in the queue is just left there.
So, in those two ways we can end up with "orphaned" data in the queue
that will never get removed - except when the connection is closed. At
that point all the queues are flushed.
An attacker could seek to exploit this by filling up the queues with
lots of large messages that are never going to be used in order to
attempt a DoS by memory exhaustion.
I will assume that we are only concerned with servers here. It does not
seem reasonable to be concerned about a memory exhaustion attack on a
client. They are unlikely to process enough connections for this to be
an issue.
A "long" handshake with many messages might be 5 messages long (in the
incoming direction), e.g. ClientHello, Certificate, ClientKeyExchange,
CertificateVerify, Finished. So this would be message sequence numbers 0
to 4. Additionally we can buffer up to 10 messages in the future.
Therefore the maximum number of messages that an attacker could send
that could get orphaned would typically be 15.
The maximum size that a DTLS message is allowed to be is defined by
max_cert_list, which by default is 100k. Therefore the maximum amount of
"orphaned" memory per connection is 1500k.
Message sequence numbers get reset after the Finished message, so
renegotiation will not extend the maximum number of messages that can be
orphaned per connection.
As noted above, the queues do get cleared when the connection is closed.
Therefore in order to mount an effective attack, an attacker would have
to open many simultaneous connections.
Issue reported by Quan Luo.
CVE-2016-2179
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Mon, 22 Aug 2016 08:09:06 +0000 (09:09 +0100)]
Silence some "maybe used uninitialised" warnings
Reviewed-by: Richard Levitte <levitte@openssl.org>
Andy Polyakov [Thu, 18 Aug 2016 11:38:42 +0000 (13:38 +0200)]
ec/ecp_nistz256.c: get is_one on 32-bit platforms right.
Thanks to Brian Smith for reporting this.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Rich Salz [Sun, 21 Aug 2016 17:23:45 +0000 (13:23 -0400)]
Fix pointer/alloc prob from previous commit
Reviewed-by: Richard Levitte <levitte@openssl.org>
Rich Salz [Sun, 21 Aug 2016 16:50:05 +0000 (12:50 -0400)]
Fix incorrect return argument.
Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
Kurt Roeckx [Sat, 6 Aug 2016 17:16:00 +0000 (19:16 +0200)]
Fix off by 1 in ASN1_STRING_set()
Reviewed-by: Rich Salz <rsalz@openssl.org>
MR: #3176
(cherry picked from commit
a73be798ced572a988d455d961a2387f6eccb549)
Rich Salz [Sat, 13 Aug 2016 14:47:50 +0000 (10:47 -0400)]
RT3940: For now, just document the issue.
Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit
2a9afa4046592d44af84644cd89fe1a0d6d46889)
Rich Salz [Fri, 19 Aug 2016 14:31:03 +0000 (10:31 -0400)]
Fix NULL-return checks in 1.0.2
RT4386: Add sanity checks for BN_new()
RT4384: Missing Sanity Checks for RSA_new_method()
RT4384: Missing Sanity Check plus potential NULL pointer deref
RT4382: Missing Sanity Check(s) for BUF_strdup()
RT4380: Missing Sanity Checks for EVP_PKEY_new()
RT4377: Prevent potential NULL pointer dereference
RT4375: Missing sanity checks for OPENSSL_malloc()
RT4374: Potential for NULL pointer dereferences
RT4371: Missing Sanity Check for malloc()
RT4370: Potential for NULL pointer dereferences
Also expand tabs, make update, typo fix (rsalz)
Minor tweak by Paul Dale.
Some minor internal review feedback.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Richard Levitte [Fri, 19 Aug 2016 13:19:00 +0000 (14:19 +0100)]
Have dtlstest run on VMS as well
Reviewed-by: Matt Caswell <matt@openssl.org>
Matt Caswell [Wed, 17 Aug 2016 16:55:36 +0000 (17:55 +0100)]
Update function error code
A function error code needed updating due to merge issues.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Tue, 5 Jul 2016 11:04:37 +0000 (12:04 +0100)]
Fix DTLS replay protection
The DTLS implementation provides some protection against replay attacks
in accordance with RFC6347 section 4.1.2.6.
A sliding "window" of valid record sequence numbers is maintained with
the "right" hand edge of the window set to the highest sequence number we
have received so far. Records that arrive that are off the "left" hand
edge of the window are rejected. Records within the window are checked
against a list of records received so far. If we already received it then
we also reject the new record.
If we have not already received the record, or the sequence number is off
the right hand edge of the window then we verify the MAC of the record.
If MAC verification fails then we discard the record. Otherwise we mark
the record as received. If the sequence number was off the right hand edge
of the window, then we slide the window along so that the right hand edge
is in line with the newly received sequence number.
Records may arrive for future epochs, i.e. a record from after a CCS being
sent, can arrive before the CCS does if the packets get re-ordered. As we
have not yet received the CCS we are not yet in a position to decrypt or
validate the MAC of those records. OpenSSL places those records on an
unprocessed records queue. It additionally updates the window immediately,
even though we have not yet verified the MAC. This will only occur if
currently in a handshake/renegotiation.
This could be exploited by an attacker by sending a record for the next
epoch (which does not have to decrypt or have a valid MAC), with a very
large sequence number. This means the right hand edge of the window is
moved very far to the right, and all subsequent legitimate packets are
dropped causing a denial of service.
A similar effect can be achieved during the initial handshake. In this
case there is no MAC key negotiated yet. Therefore an attacker can send a
message for the current epoch with a very large sequence number. The code
will process the record as normal. If the hanshake message sequence number
(as opposed to the record sequence number that we have been talking about
so far) is in the future then the injected message is bufferred to be
handled later, but the window is still updated. Therefore all subsequent
legitimate handshake records are dropped. This aspect is not considered a
security issue because there are many ways for an attacker to disrupt the
initial handshake and prevent it from completing successfully (e.g.
injection of a handshake message will cause the Finished MAC to fail and
the handshake to be aborted). This issue comes about as a result of trying
to do replay protection, but having no integrity mechanism in place yet.
Does it even make sense to have replay protection in epoch 0? That
issue isn't addressed here though.
This addressed an OCAP Audit issue.
CVE-2016-2181
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Tue, 5 Jul 2016 10:52:43 +0000 (11:52 +0100)]
Add DTLS replay protection test
Injects a record from epoch 1 during epoch 0 handshake, with a record
sequence number in the future, to test that the record replay protection
feature works as expected. This is described more fully in the next commit.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Tue, 5 Jul 2016 10:46:26 +0000 (11:46 +0100)]
Fix DTLS unprocessed records bug
During a DTLS handshake we may get records destined for the next epoch
arrive before we have processed the CCS. In that case we can't decrypt or
verify the record yet, so we buffer it for later use. When we do receive
the CCS we work through the queue of unprocessed records and process them.
Unfortunately the act of processing wipes out any existing packet data
that we were still working through. This includes any records from the new
epoch that were in the same packet as the CCS. We should only process the
buffered records if we've not got any data left.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Tue, 5 Jul 2016 10:37:40 +0000 (11:37 +0100)]
Add a DTLS unprocesed records test
Add a test to inject a record from the next epoch during the handshake and
make sure it doesn't get processed immediately.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Matt Caswell [Tue, 5 Jul 2016 10:36:10 +0000 (11:36 +0100)]
Back port ssltestlib code to 1.0.2
Enables the testing of DTLS code in 1.0.2
Reviewed-by: Richard Levitte <levitte@openssl.org>
Richard Levitte [Wed, 3 Aug 2016 19:45:06 +0000 (21:45 +0200)]
VSI submission: RAND fixups
- make the VMS version of RAND_poll() faster and more secure
- avoid pointer size warnings with setvbuf()
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Wed, 3 Aug 2016 19:33:31 +0000 (21:33 +0200)]
VSI submission: make better use of item lists in o_time.c
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Wed, 3 Aug 2016 19:22:34 +0000 (21:22 +0200)]
VSI submission: avoid pointer size warnings in mem.c
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Wed, 3 Aug 2016 19:18:55 +0000 (21:18 +0200)]
evp_test.c: avoid warning from having a pointer difference returned as int
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Thu, 18 Aug 2016 13:42:42 +0000 (15:42 +0200)]
VMS: synchronise tests with Unix
Reviewed-by: Rich Salz <rsalz@openssl.org>
Richard Levitte [Tue, 16 Aug 2016 12:14:33 +0000 (14:14 +0200)]
make update to have PEM_R_HEADER_TOO_LONG defined
Reviewed-by: Rich Salz <rsalz@openssl.org>
Dr. Stephen Henson [Mon, 15 Aug 2016 15:52:21 +0000 (16:52 +0100)]
Limit reads in do_b2i_bio()
Apply a limit to the maximum blob length which can be read in do_d2i_bio()
to avoid excessive allocation.
Thanks to Shi Lei for reporting this.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
66bcba145740e4f1210499ba6e5033035a2a4647)
Dr. Stephen Henson [Fri, 5 Aug 2016 13:26:03 +0000 (14:26 +0100)]
Check for errors in BN_bn2dec()
If an oversize BIGNUM is presented to BN_bn2dec() it can cause
BN_div_word() to fail and not reduce the value of 't' resulting
in OOB writes to the bn_data buffer and eventually crashing.
Fix by checking return value of BN_div_word() and checking writes
don't overflow buffer.
Thanks to Shi Lei for reporting this bug.
CVE-2016-2182
Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit
07bed46f332fce8c1d157689a2cdf915a982ae34)
Conflicts:
crypto/bn/bn_print.c
Dr. Stephen Henson [Fri, 5 Aug 2016 13:33:03 +0000 (14:33 +0100)]
Check for errors in a2d_ASN1_OBJECT()
Check for error return in BN_div_word().
Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit
8b9afbc0fc7f8be0049d389d34d9416fa377e2aa)
Andy Polyakov [Sun, 31 Jul 2016 19:19:57 +0000 (21:19 +0200)]
sha/asm/sha1-x86_64.pl: fix crash in SHAEXT code on Windows.
RT#4530
Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit
7123aa81e9fb19afb11fdf3850662c5f7ff1f19c)
Dr. Stephen Henson [Fri, 5 Aug 2016 16:59:32 +0000 (17:59 +0100)]
Sanity check input length in OPENSSL_uni2asc().
Thanks to Hanno Böck for reporting this bug.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
39a43280316f1b9c45be5ac5b04f4f5c3f923686)
Conflicts:
crypto/pkcs12/p12_utl.c
Dr. Stephen Henson [Fri, 5 Aug 2016 15:21:26 +0000 (16:21 +0100)]
Leak fixes.
Fix error path leaks in a2i_ASN1_STRING(), a2i_ASN1_INTEGER() and
a2i_ASN1_ENUMERATED().
Thanks to Shi Lei for reporting these issues.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Kurt Roeckx [Sat, 16 Jul 2016 14:56:54 +0000 (16:56 +0200)]
Return error when trying to print invalid ASN1 integer
GH: #1322
(cherry picked from commit
5e3553c2de9a365479324b8ba8b998f0cce3e527)
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Stephen Henson <steve@openssl.org>
Dr. Stephen Henson [Thu, 4 Aug 2016 14:00:26 +0000 (15:00 +0100)]
Limit recursion depth in old d2i_ASN1_bytes function
Thanks to Shi Lei for reporting this bug.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Dr. Stephen Henson [Thu, 4 Aug 2016 12:54:51 +0000 (13:54 +0100)]
Check for overflows in i2d_ASN1_SET()
Thanks to Shi Lei for reporting this issue.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Dr. Stephen Henson [Tue, 2 Aug 2016 20:38:37 +0000 (21:38 +0100)]
Limit status message sisze in ts_get_status_check
Thanks to Shi Lei for reporting this issue.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
20fc103f782bb0bcd41d211c6423187b02146b9d)
Conflicts:
include/openssl/ts.h
Richard Levitte [Wed, 3 Aug 2016 14:02:20 +0000 (16:02 +0200)]
Don't check any revocation info on proxy certificates
Because proxy certificates typically come without any CRL information,
trying to check revocation on them will fail. Better not to try
checking such information for them at all.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
790555d6756285b3ec18e3efbb195cf33f217d8f)
Dr. Stephen Henson [Tue, 2 Aug 2016 22:53:41 +0000 (23:53 +0100)]
Calculate sequence length properly.
Use correct length in old ASN.1 indefinite length sequence decoder
(only used by SSL_SESSION).
This bug was discovered by Hanno Böck using libfuzzer.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Dr. Stephen Henson [Tue, 2 Aug 2016 22:41:45 +0000 (23:41 +0100)]
include <limits.h>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Dr. Stephen Henson [Mon, 1 Aug 2016 23:30:47 +0000 (00:30 +0100)]
Check for overflows in ASN1_object_size().
Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit
e9f17097e9fbba3e7664cd67e54eebf2bd438863)
Dr. Stephen Henson [Mon, 1 Aug 2016 23:45:31 +0000 (00:45 +0100)]
Check for overlows and error return from ASN1_object_size()
Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit
56f9953c846204cb3251ab27605e403c7444fd72)
Dr. Stephen Henson [Fri, 29 Jul 2016 16:54:52 +0000 (17:54 +0100)]
Fix CRL time comparison.
Thanks to David Benjamin <davidben@google.com> for reporting this bug.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
e032117db251968bd09badc7d4718c2497302e55)
Rich Salz [Wed, 27 Jul 2016 15:09:07 +0000 (11:09 -0400)]
Add missing casts.
Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
Dr. Stephen Henson [Tue, 26 Jul 2016 19:22:49 +0000 (20:22 +0100)]
Note cipher BIO write errors too.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
976ef6adcc157233fb641ca99e2424630ef1814f)
Conflicts:
crypto/evp/bio_enc.c
Dr. Stephen Henson [Tue, 26 Jul 2016 15:51:49 +0000 (16:51 +0100)]
Set error if EVP_CipherUpdate fails.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
ee6ce5cc368574c0b0b470e61ee2f82a0efadbb7)
Conflicts:
crypto/evp/bio_enc.c
Dr. Stephen Henson [Fri, 22 Jul 2016 12:43:41 +0000 (13:43 +0100)]
Use newest CRL.
If two CRLs are equivalent then use the one with a later lastUpdate field:
this will result in the newest CRL available being used.
RT#4615
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
626aa24849be549b7ef4f049d8427989940c8a37)
Dr. Stephen Henson [Fri, 22 Jul 2016 15:02:07 +0000 (16:02 +0100)]
Send alert for bad DH CKE
RT#4511
Reviewed-by: Matt Caswell <matt@openssl.org>
Dr. Stephen Henson [Thu, 21 Jul 2016 14:24:16 +0000 (15:24 +0100)]
Fix OOB read in TS_OBJ_print_bio().
TS_OBJ_print_bio() misuses OBJ_txt2obj: it should print the result
as a null terminated buffer. The length value returned is the total
length the complete text reprsentation would need not the amount of
data written.
CVE-2016-2180
Thanks to Shi Lei for reporting this bug.
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit
0ed26acce328ec16a3aa635f1ca37365e8c7403a)
Dr. Stephen Henson [Fri, 22 Jul 2016 13:11:13 +0000 (14:11 +0100)]
Clarify digest change in HMAC_Init_ex()
RT#4603
Reviewed-by: Rich Salz <rsalz@openssl.org>
Todd Short [Tue, 5 Jul 2016 13:59:29 +0000 (09:59 -0400)]
OCSP_request_add0_id() inconsistent error return
There are two failure cases for OCSP_request_add_id():
1. OCSP_ONEREQ_new() failure, where |cid| is not freed
2. sk_OCSP_ONEREQ_push() failure, where |cid| is freed
This changes makes the error behavior consistent, such that |cid| is
not freed when sk_OCSP_ONEREQ_push() fails. OpenSSL only takes
ownership of |cid| when the function succeeds.
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1289)
(cherry picked from commit
415e7c488e09119a42be24129e38ddd43524ee06)
Dr. Stephen Henson [Tue, 19 Jul 2016 15:03:10 +0000 (16:03 +0100)]
Sanity check in ssl_get_algorithm2().
RT#4600
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
52eede5a970fdb30c4ed6d3663e51f36bd1b1c73)
Conflicts:
ssl/s3_lib.c
Dr. Stephen Henson [Tue, 19 Jul 2016 16:20:58 +0000 (17:20 +0100)]
Send alert on CKE error.
RT#4610
Reviewed-by: Rich Salz <rsalz@openssl.org>
Dr. Stephen Henson [Tue, 19 Jul 2016 11:32:05 +0000 (12:32 +0100)]
Support PKCS v2.0 print in pkcs12 utility.
Extended alg_print() in pkcs12 utility to support PBES2 algorithms.
RT#4588
Reviewed-by: Rich Salz <rsalz@openssl.org>
Dr. Stephen Henson [Mon, 18 Jul 2016 22:59:39 +0000 (23:59 +0100)]
Check and print out boolean type properly.
If underlying type is boolean don't check field is NULL.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
ad72d9fdf7709ddb97a58d7d45d755e6e0504b96)
Dr. Stephen Henson [Mon, 18 Jul 2016 16:52:56 +0000 (17:52 +0100)]
Fix print of ASN.1 BIGNUM type.
The ASN.1 BIGNUM type needs to be handled in a custom way as it is
not a generic ASN1_STRING type.
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
3cea73a7fcaaada1ea0ee4b4353ed0176fee1112)
Conflicts:
crypto/asn1/x_bignum.c
Richard Levitte [Fri, 15 Jul 2016 16:41:37 +0000 (18:41 +0200)]
Remove the silly CVS markers from LPdir_*.c
Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit
28e90f69fbcdcd3c06359a53adceb2dbdfaba614)