Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2015-2721

Published: Jul 06, 2015 | Modified: Apr 12, 2025
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N
RedHat/V2
5.1 MODERATE
AV:N/AC:H/Au:N/C:P/I:P/A:P
RedHat/V3
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2015-2721
CWEhttps://cwe.mitre.org/data/definitions/310.html

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 Software

NameVendorStart VersionEnd Version
Suse_linux_enterprise_software_development_kitNovell12.0 (including)12.0 (including)
Ubuntu_linuxCanonical12.04 (including)12.04 (including)
Ubuntu_linuxCanonical14.04 (including)14.04 (including)
Ubuntu_linuxCanonical14.10 (including)14.10 (including)
Ubuntu_linuxCanonical15.04 (including)15.04 (including)
Debian_linuxDebian7.0 (including)7.0 (including)
Debian_linuxDebian8.0 (including)8.0 (including)
Suse_linux_enterprise_desktopNovell12.0 (including)12.0 (including)
Suse_linux_enterprise_serverNovell11-sp4 (including)11-sp4 (including)
Suse_linux_enterprise_serverNovell12.0 (including)12.0 (including)
Red Hat Enterprise Linux 5RedHatnss-0:3.19.1-1.el5_11*
Red Hat Enterprise Linux 6RedHatnss-0:3.19.1-3.el6_6*
Red Hat Enterprise Linux 6RedHatnss-util-0:3.19.1-1.el6_6*
Red Hat Enterprise Linux 7RedHatnss-0:3.19.1-3.ael7b_1*
Red Hat Enterprise Linux 7RedHatnss-util-0:3.19.1-1.ael7b_1*
FirefoxUbuntudevel*
FirefoxUbuntuprecise*
FirefoxUbuntutrusty*
FirefoxUbuntuupstream*
FirefoxUbuntuutopic*
FirefoxUbuntuvivid*
NssUbuntudevel*
NssUbuntuesm-infra-legacy/trusty*
NssUbuntuprecise*
NssUbuntutrusty*
NssUbuntutrusty/esm*
NssUbuntuupstream*
NssUbuntuutopic*
NssUbuntuvivid*
NssUbuntuvivid/stable-phone-overlay*
ThunderbirdUbuntudevel*
ThunderbirdUbuntuprecise*
ThunderbirdUbuntutrusty*
ThunderbirdUbuntuupstream*
ThunderbirdUbuntuutopic*
ThunderbirdUbuntuvivid*

References

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