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CVE-2015-2721

Published: 5 July 2015

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.

Priority

Medium

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
precise
Released (39.0+build5-0ubuntu0.12.04.2)
trusty Does not exist
(trusty was released [39.0+build5-0ubuntu0.14.04.1])
upstream
Released (39.0)
utopic
Released (39.0+build5-0ubuntu0.14.10.1)
vivid
Released (39.0+build5-0ubuntu0.15.04.1)
nss
Launchpad, Ubuntu, Debian
precise
Released (3.19.2-0ubuntu0.12.04.1)
trusty
Released (2:3.19.2-0ubuntu0.14.04.1)
upstream
Released (2:3.19.1-1)
utopic
Released (2:3.19.2-0ubuntu0.14.10.1)
vivid
Released (2:3.19.2-0ubuntu15.04.1)
thunderbird
Launchpad, Ubuntu, Debian
precise
Released (1:31.8.0+build1-0ubuntu0.12.04.1)
trusty Does not exist
(trusty was released [1:31.8.0+build1-0ubuntu0.14.04.1])
upstream
Released (31.8)
utopic
Released (1:31.8.0+build1-0ubuntu0.14.10.1)
vivid
Released (1:31.8.0+build1-0ubuntu0.15.04.1)