CVE-2015-2721

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2015-2721
StatePUBLISHED
Assignermozilla
Source PriorityCVE Program / NVD first with legacy fallback
Published2015-07-06 02:00:49 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionMozilla 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.

Risk And Classification

Primary CVSS: v2.0 4.3 from [email protected]

AV:N/AC:M/Au:N/C:N/I:P/A:N

Problem Types: CWE-310 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None

AV:N/AC:M/Au:N/C:N/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Canonical Ubuntu Linux 12.04 All All All
Operating System Canonical Ubuntu Linux 14.04 All All All
Operating System Canonical Ubuntu Linux 14.10 All All All
Operating System Canonical Ubuntu Linux 15.04 All All All
Operating System Debian Debian Linux 7.0 All All All
Operating System Debian Debian Linux 8.0 All All All
Application Mozilla Firefox 31.0 All All All
Application Mozilla Firefox 31.1.0 All All All
Application Mozilla Firefox 31.1.1 All All All
Application Mozilla Firefox 31.3.0 All All All
Application Mozilla Firefox 31.5.1 All All All
Application Mozilla Firefox 31.5.2 All All All
Application Mozilla Firefox 31.5.3 All All All
Application Mozilla Firefox 38.0 All All All
Application Mozilla Firefox All All All All
Application Mozilla Firefox Esr 31.1 All All All
Application Mozilla Firefox Esr 31.2 All All All
Application Mozilla Firefox Esr 31.3 All All All
Application Mozilla Firefox Esr 31.4 All All All
Application Mozilla Firefox Esr 31.5 All All All
Application Mozilla Firefox Esr 31.6.0 All All All
Application Mozilla Firefox Esr 31.7.0 All All All
Application Mozilla Network Security Services 3.19 All All All
Application Mozilla Thunderbird All All All All
Operating System Novell Suse Linux Enterprise Desktop 12.0 All All All
Operating System Novell Suse Linux Enterprise Server 11 sp4 All All
Operating System Novell Suse Linux Enterprise Server 12.0 All All All
Application Novell Suse Linux Enterprise Software Development Kit 12.0 All All All
Operating System Oracle Solaris 11.3 All All All
Operating System Oracle Vm Server 3.2 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
USN-2656-2: Firefox vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com
1086145 – (CVE-2015-2721) NSS incorrectly permits skipping of ServerKeyExchange af854a3a-2127-422b-91ae-364da2661108 bugzilla.mozilla.org Exploit, Issue Tracking, VDB Entry, Vendor Advisory
NSS incorrectly permits skipping of ServerKeyExchange — Mozilla af854a3a-2127-422b-91ae-364da2661108 www.mozilla.org Vendor Advisory
Mozilla Network Security Services CVE-2015-2721 Security Bypass Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Mozilla Firefox/Thunderbird Multiple Security Vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Oracle VM Server for x86 Bulletin - July 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
USN-2656-1: Firefox vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com
[security-announce] SUSE-SU-2015:1269-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Third Party Advisory
Mozilla Thunderbird Multiple Flaws Let Remote Users Execute Arbitrary Code, Obtain Potentially Sensitive Information, and Bypass Security Restrictions - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
USN-2672-1: NSS vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com
Debian -- Security Information -- DSA-3324-1 icedove af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
[security-announce] openSUSE-SU-2015:1229-1: important: Security update af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 rhn.redhat.com
Oracle Critical Patch Update - July 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
[security-announce] SUSE-SU-2015:1449-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
Oracle Solaris Third Party Bulletin - October 2015 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
USN-2673-1: Thunderbird vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com Third Party Advisory
Oracle Critical Patch Update Advisory - April 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
Mozilla Firefox Multiple Flaws Let Remote Users Execute Arbitrary Code, Obtain Potentially Sensitive Information, Bypass Security Restrictions, and Gain Elevated Privileges - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
NSS 3.19 release notes - Mozilla | MDN af854a3a-2127-422b-91ae-364da2661108 developer.mozilla.org Release Notes
Debian -- Security Information -- DSA-3336-1 nss af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 rhn.redhat.com
miTLS - A verified reference implementation of TLS af854a3a-2127-422b-91ae-364da2661108 smacktls.com Technical Description
[security-announce] SUSE-SU-2015:1268-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Third Party Advisory
Mozilla Network Security Service (NSS): Multiple vulnerabilities (GLSA 201701-46) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
Oracle July 2016 Critical Patch Update Multiple Vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory
[security-announce] openSUSE-SU-2015:1266-1: important: Mozilla (Firefox af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
Mozilla Products: Multiple vulnerabilities (GLSA 201512-10) — Gentoo Security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
Oracle Solaris Bulletin - April 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 710518 Gentoo Linux Mozilla Network Security Service (NSS) Multiple Vulnerabilities (GLSA 201701-46)
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report