DEBIAN-CVE-2015-2721

Advisory lineage Upstream: 1 Downstream: 4
Upstream
CVE-2015-2721
Published: 06 Jul 2015, 02:00
Last modified:28 Apr 2026, 20:14

Vulnerability Summary

Overall Risk (default)
minimal
0/100
CVSS Score
No data
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 Jul 2015, 02:00
Published
Vulnerability first disclosed
28 Apr 2026, 20:14
Last Modified
Vulnerability information updated

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.

Affected Systems

  • debian•nss

    < 2:3.19.1-1 | < 2:3.19.1-1 | < 2:3.19.1-1 | < 2:3.19.1-1

References (1)