CVE-2015-2721 Information

Description

Mozilla Network Security Services (NSS) before 3.19 as used in Mozilla Firefox before 39.0 Firefox ESR 31.x before 31.8 and 38.x before 38.1 Thunderbird before 38.1 and other products does not properly determine state transitions for the TLS state machine which allows man-in-the-middle attackers to defeat cryptographic protection mechanisms by blocking messages as demonstrated by removing a forward-secrecy property by blocking a ServerKeyExchange message aka a \SMACK SKIP-TLS\ issue.

Reference

http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00025.html http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00031.html http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00033.html http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00034.html http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00021.html http://rhn.redhat.com/errata/RHSA-2015-1185.html http://rhn.redhat.com/errata/RHSA-2015-1664.html http://www.debian.org/security/2015/dsa-3324 http://www.debian.org/security/2015/dsa-3336 http://www.mozilla.org/security/announce/2015/mfsa2015-71.html http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html http://www.securityfocus.com/bid/75541 http://www.securityfocus.com/bid/83398 http://www.securityfocus.com/bid/91787 http://www.securitytracker.com/id/1032783 http://www.securitytracker.com/id/1032784 http://www.ubuntu.com/usn/USN-2656-1 http://www.ubuntu.com/usn/USN-2656-2 http://www.ubuntu.com/usn/USN-2672-1 http://www.ubuntu.com/usn/USN-2673-1 https://bugzilla.mozilla.org/show_bug.cgi?id=1086145 https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.19_release_notes https://security.gentoo.org/glsa/201512-10 https://security.gentoo.org/glsa/201701-46 https://smacktls.com