pkgsrc-Changes archive
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
CVS commit: pkgsrc/security/openssl
Module Name: pkgsrc
Committed By: jperkin
Date: Thu Jan 28 16:30:43 UTC 2016
Modified Files:
pkgsrc/security/openssl: Makefile PLIST.common distinfo
pkgsrc/security/openssl/patches: patch-Configure patch-Makefile.org
patch-Makefile.shared patch-apps_Makefile patch-config
patch-crypto_bn_bn__prime.pl patch-crypto_des_Makefile
patch-engines_ccgost_Makefile patch-tools_Makefile
Log Message:
Update security/openssl to version 1.0.2f.
Changes between 1.0.2e and 1.0.2f [28 Jan 2016]
*) DH small subgroups
Historically OpenSSL only ever generated DH parameters based on "safe"
primes. More recently (in version 1.0.2) support was provided for
generating X9.42 style parameter files such as those required for RFC 5114
support. The primes used in such files may not be "safe". Where an
application is using DH configured with parameters based on primes that are
not "safe" then an attacker could use this fact to find a peer's private
DH exponent. This attack requires that the attacker complete multiple
handshakes in which the peer uses the same private DH exponent. For example
this could be used to discover a TLS server's private DH exponent if it's
reusing the private DH exponent or it's using a static DH ciphersuite.
OpenSSL provides the option SSL_OP_SINGLE_DH_USE for ephemeral DH (DHE) in
TLS. It is not on by default. If the option is not set then the server
reuses the same private DH exponent for the life of the server process and
would be vulnerable to this attack. It is believed that many popular
applications do set this option and would therefore not be at risk.
The fix for this issue adds an additional check where a "q" parameter is
available (as is the case in X9.42 based parameters). This detects the
only known attack, and is the only possible defense for static DH
ciphersuites. This could have some performance impact.
Additionally the SSL_OP_SINGLE_DH_USE option has been switched on by
default and cannot be disabled. This could have some performance impact.
This issue was reported to OpenSSL by Antonio Sanso (Adobe).
(CVE-2016-0701)
[Matt Caswell]
*) SSLv2 doesn't block disabled ciphers
A malicious client can negotiate SSLv2 ciphers that have been disabled on
the server and complete SSLv2 handshakes even if all SSLv2 ciphers have
been disabled, provided that the SSLv2 protocol was not also disabled via
SSL_OP_NO_SSLv2.
This issue was reported to OpenSSL on 26th December 2015 by Nimrod Aviram
and Sebastian Schinzel.
(CVE-2015-3197)
[Viktor Dukhovni]
*) Reject DH handshakes with parameters shorter than 1024 bits.
[Kurt Roeckx]
To generate a diff of this commit:
cvs rdiff -u -r1.219 -r1.220 pkgsrc/security/openssl/Makefile
cvs rdiff -u -r1.26 -r1.27 pkgsrc/security/openssl/PLIST.common
cvs rdiff -u -r1.119 -r1.120 pkgsrc/security/openssl/distinfo
cvs rdiff -u -r1.6 -r1.7 pkgsrc/security/openssl/patches/patch-Configure
cvs rdiff -u -r1.4 -r1.5 pkgsrc/security/openssl/patches/patch-Makefile.org \
pkgsrc/security/openssl/patches/patch-Makefile.shared
cvs rdiff -u -r1.3 -r1.4 pkgsrc/security/openssl/patches/patch-apps_Makefile \
pkgsrc/security/openssl/patches/patch-config \
pkgsrc/security/openssl/patches/patch-crypto_bn_bn__prime.pl \
pkgsrc/security/openssl/patches/patch-crypto_des_Makefile \
pkgsrc/security/openssl/patches/patch-engines_ccgost_Makefile \
pkgsrc/security/openssl/patches/patch-tools_Makefile
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Home |
Main Index |
Thread Index |
Old Index