https://github.com/openssl/openssl/commits/ and pick the appropriate
release branch.
- Changes between 1.1.1c and 1.1.1d [xx XXX xxxx]
+ Changes between 1.1.1c and 1.1.1d [10 Sep 2019]
- *)
+ *) Fixed a fork protection issue. OpenSSL 1.1.1 introduced a rewritten random
+ number generator (RNG). This was intended to include protection in the
+ event of a fork() system call in order to ensure that the parent and child
+ processes did not share the same RNG state. However this protection was not
+ being used in the default case.
+
+ A partial mitigation for this issue is that the output from a high
+ precision timer is mixed into the RNG state so the likelihood of a parent
+ and child process sharing state is significantly reduced.
+
+ If an application already calls OPENSSL_init_crypto() explicitly using
+ OPENSSL_INIT_ATFORK then this problem does not occur at all.
+ (CVE-2019-1549)
+ [Matthias St. Pierre]
+
+ *) For built-in EC curves, ensure an EC_GROUP built from the curve name is
+ used even when parsing explicit parameters, when loading a serialized key
+ or calling `EC_GROUP_new_from_ecpkparameters()`/
+ `EC_GROUP_new_from_ecparameters()`.
+ This prevents bypass of security hardening and performance gains,
+ especially for curves with specialized EC_METHODs.
+ By default, if a key encoded with explicit parameters is loaded and later
+ serialized, the output is still encoded with explicit parameters, even if
+ internally a "named" EC_GROUP is used for computation.
+ [Nicola Tuveri]
+
+ *) Compute ECC cofactors if not provided during EC_GROUP construction. Before
+ this change, EC_GROUP_set_generator would accept order and/or cofactor as
+ NULL. After this change, only the cofactor parameter can be NULL. It also
+ does some minimal sanity checks on the passed order.
+ (CVE-2019-1547)
+ [Billy Bob Brumley]
+
+ *) Fixed a padding oracle in PKCS7_dataDecode and CMS_decrypt_set1_pkey.
+ An attack is simple, if the first CMS_recipientInfo is valid but the
+ second CMS_recipientInfo is chosen ciphertext. If the second
+ recipientInfo decodes to PKCS #1 v1.5 form plaintext, the correct
+ encryption key will be replaced by garbage, and the message cannot be
+ decoded, but if the RSA decryption fails, the correct encryption key is
+ used and the recipient will not notice the attack.
+ As a work around for this potential attack the length of the decrypted
+ key must be equal to the cipher default key length, in case the
+ certifiate is not given and all recipientInfo are tried out.
+ The old behaviour can be re-enabled in the CMS code by setting the
+ CMS_DEBUG_DECRYPT flag.
+ (CVE-2019-1563)
+ [Bernd Edlinger]
+
+ *) Early start up entropy quality from the DEVRANDOM seed source has been
+ improved for older Linux systems. The RAND subsystem will wait for
+ /dev/random to be producing output before seeding from /dev/urandom.
+ The seeded state is stored for future library initialisations using
+ a system global shared memory segment. The shared memory identifier
+ can be configured by defining OPENSSL_RAND_SEED_DEVRANDOM_SHM_ID to
+ the desired value. The default identifier is 114.
+ [Paul Dale]
+
+ *) Correct the extended master secret constant on EBCDIC systems. Without this
+ fix TLS connections between an EBCDIC system and a non-EBCDIC system that
+ negotiate EMS will fail. Unfortunately this also means that TLS connections
+ between EBCDIC systems with this fix, and EBCDIC systems without this
+ fix will fail if they negotiate EMS.
+ [Matt Caswell]
+
+ *) Use Windows installation paths in the mingw builds
+
+ Mingw isn't a POSIX environment per se, which means that Windows
+ paths should be used for installation.
+ (CVE-2019-1552)
+ [Richard Levitte]
+
+ *) Changed DH_check to accept parameters with order q and 2q subgroups.
+ With order 2q subgroups the bit 0 of the private key is not secret
+ but DH_generate_key works around that by clearing bit 0 of the
+ private key for those. This avoids leaking bit 0 of the private key.
+ [Bernd Edlinger]
+
+ *) Significantly reduce secure memory usage by the randomness pools.
+ [Paul Dale]
+
+ *) Revert the DEVRANDOM_WAIT feature for Linux systems
+
+ The DEVRANDOM_WAIT feature added a select() call to wait for the
+ /dev/random device to become readable before reading from the
+ /dev/urandom device.
+
+ It turned out that this change had negative side effects on
+ performance which were not acceptable. After some discussion it
+ was decided to revert this feature and leave it up to the OS
+ resp. the platform maintainer to ensure a proper initialization
+ during early boot time.
+ [Matthias St. Pierre]
Changes between 1.1.1b and 1.1.1c [28 May 2019]
(CVE-2019-1543)
[Matt Caswell]
+ *) Add DEVRANDOM_WAIT feature for Linux systems
+
+ On older Linux systems where the getrandom() system call is not available,
+ OpenSSL normally uses the /dev/urandom device for seeding its CSPRNG.
+ Contrary to getrandom(), the /dev/urandom device will not block during
+ early boot when the kernel CSPRNG has not been seeded yet.
+
+ To mitigate this known weakness, use select() to wait for /dev/random to
+ become readable before reading from /dev/urandom.
+
*) Ensure that SM2 only uses SM3 as digest algorithm
[Paul Yang]
SSL_set_ciphersuites()
[Matt Caswell]
- *) Memory allocation failures consistenly add an error to the error
+ *) Memory allocation failures consistently add an error to the error
stack.
[Rich Salz]
reason texts, thereby removing some of the footprint that may not
be interesting if those errors aren't displayed anyway.
- NOTE: it's still possible for any application or module to have it's
+ NOTE: it's still possible for any application or module to have its
own set of error texts inserted. The routines are there, just not
used by default when no-err is given.
[Richard Levitte]
Changes between 0.9.6g and 0.9.6h [5 Dec 2002]
*) New function OPENSSL_cleanse(), which is used to cleanse a section of
- memory from it's contents. This is done with a counter that will
+ memory from its contents. This is done with a counter that will
place alternating values in each byte. This can be used to solve
two issues: 1) the removal of calls to memset() by highly optimizing
compilers, and 2) cleansing with other values than 0, since those can
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