-This is the README file for tinc version 1.0.28. Installation
+This is the README file for tinc version 1.0.35. Installation
instructions may be found in the INSTALL file.
-tinc is Copyright (C) 1998-2016 by:
+tinc is Copyright (C) 1998-2018 by:
Ivo Timmermans,
Guus Sliepen <guus@tinc-vpn.org>,
his opinion. We do not know of a way to exploit these weaknesses, but these
issues are being addressed in the tinc 1.1 branch.
+The Sweet32 attack affects versions of tinc prior to 1.0.30.
+
+On September 6th, 2018, Michael Yonly contacted us and provided
+proof-of-concept code that allowed a remote attacker to create an
+authenticated, one-way connection with a node, and also that there was a
+possibility for a man-in-the-middle to force UDP packets from a node to be sent
+in plaintext. The first issue was trivial to exploit on tinc versions prior to
+1.0.30, but the changes in 1.0.30 to mitigate the Sweet32 attack made this
+weakness much harder to exploit. These issues have been fixed in tinc 1.0.35.
+The new protocol in the tinc 1.1 branch is not susceptible to these issues.
+
Cryptography is a hard thing to get right. We cannot make any
guarantees. Time, review and feedback are the only things that can
prove the security of any cryptographic product. If you wish to review
tinc or give us feedback, you are strongly encouraged to do so.
-Changes to configuration file format since 1.0pre5
---------------------------------------------------
-
-Some configuration variables have different names now. Most notably "TapDevice"
-should be changed into "Device", and "Device" should be changed into
-"BindToDevice".
-
Compatibility
-------------
-Version 1.0.28 is compatible with 1.0pre8, 1.0 and later, but not with older
-versions of tinc.
+Version 1.0.35 is compatible with 1.0pre8, 1.0 and later, but not with older
+versions of tinc. Note that since version 1.0.30, tinc requires all nodes in
+the VPN to be compiled with a version of LibreSSL or OpenSSL that supports the
+AES256 and SHA256 algorithms.
Requirements
------------
-Since 1.0pre3, we use OpenSSL for all cryptographic functions. So you
-need to install this library first; grab it from
-http://www.openssl.org/. You will need version 0.9.7 or later. If
-this library is not installed on you system, configure will fail. The
-manual in doc/tinc.texi contains more detailed information on how to
-install this library.
+The OpenSSL library is used for all cryptographic functions. You can find it at
+https://www.openssl.org/. You will need version 1.0.1 or later with support for
+AES256 and SHA256 enabled. If this library is not installed on your system, the
+configure script will fail. The manual in doc/tinc.texi contains more detailed
+information on how to install this library. Alternatively, you may also use the
+LibreSSL library.
-Since 1.0pre6, the zlib library is used for optional compression. You can
-find it at http://www.gzip.org/zlib/. Because of a possible exploit in
+The zlib library is used for optional compression. You can
+find it at https://zlib.net/. Because of a possible exploit in
earlier versions we recommend that you download version 1.1.4 or later.
-Since 1.0, the lzo library is also used for optional compression. You can
-find it at http://www.oberhumer.com/opensource/lzo/.
+The LZO library is also used for optional compression. You can
+find it at https://www.oberhumer.com/opensource/lzo/.
-In order to compile tinc, you will need a GNU C compiler environment.
+In order to compile tinc, you will need a C99 compliant compiler.
Features
projects / oweals / tinc.git / blobdiff