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CVE-2015-2721

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 bef…

Impact

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.

Affected products

VendorProductAffected versions
NovellSuse Linux Enterprise Software Development Kit
Version 12.0
CanonicalUbuntu Linux
Versions 12.04, 14.04, 14.10, 15.04
DebianDebian Linux
Versions 7.0, 8.0
NovellSuse Linux Enterprise Desktop
Version 12.0
NovellSuse Linux Enterprise Server
Versions 11, 12.0
MozillaNetwork Security Services
Version 3.19
OracleSolaris
Version 11.3
OracleVm Server
Version 3.2

Weakness classification

CWE-310

References