CVE-2015-2721

Advisory lineage Upstream: 0 Downstream: 20
Modified
Published: 06 Jul 2015, 01:00
Last modified:06 Aug 2024, 05:24

Vulnerability Summary

Overall Risk (default)
medium
27/100
CVSS Score
4.3 MEDIUM
v2.0 (nvd)
EPSS Score
0.51% LOW
1% probability -0.10%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

06 Jul 2015, 01:00
Published
Vulnerability first disclosed
06 Aug 2024, 05:24
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.

CVSS Metrics

  • v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.51%• Percentile: 67%

Techniques & Countermeasures

  • CWE-310•Cryptographic Issues

    Weaknesses in this category are related to the design and implementation of data confidentiality and integrity. Frequently these deal with the use of encoding techniques, encryption libraries, and hashing algorithms. The weaknesses in this category could lead to a degradation of the quality data if they are not addressed.

Affected Systems

  • canonical•ubuntu_linux

    12.04 | 14.04 | 14.10 | 15.04

  • debian•debian_linux

    7.0 | 8.0

  • mozilla•network_security_services

    3.19

  • novell•suse_linux_enterprise_desktop

    12.0

  • novell•suse_linux_enterprise_server

    11:sp4 | 12.0

  • novell•suse_linux_enterprise_software_development_kit

    12.0

  • Unknown•Solaris

    11.3

  • oracle•vm_server

    3.2

References (29)