Unrated severityNVD Advisory· Published Jul 6, 2015· Updated May 6, 2026
CVE-2015-2721
CVE-2015-2721
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 products
13- cpe:2.3:a:mozilla:network_security_services:3.19:*:*:*:*:*:*:*
- cpe:2.3:a:novell:suse_linux_enterprise_software_development_kit:12.0:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*+ 3 more
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:novell:suse_linux_enterprise_desktop:12.0:*:*:*:*:*:*:*
cpe:2.3:o:novell:suse_linux_enterprise_server:11:sp4:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:novell:suse_linux_enterprise_server:11:sp4:*:*:*:*:*:*
- cpe:2.3:o:novell:suse_linux_enterprise_server:12.0:*:*:*:*:*:*:*
- cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*
- cpe:2.3:o:oracle:vm_server:3.2:*:*:*:*:*:*:*
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
29- bugzilla.mozilla.org/show_bug.cginvdExploitIssue TrackingVDB EntryVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2015-07/msg00033.htmlnvdThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2015-07/msg00034.htmlnvdThird Party Advisory
- www.debian.org/security/2015/dsa-3324nvdThird Party Advisory
- www.debian.org/security/2015/dsa-3336nvdThird Party Advisory
- www.mozilla.org/security/announce/2015/mfsa2015-71.htmlnvdVendor Advisory
- www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.htmlnvdThird Party Advisory
- www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.htmlnvdThird Party Advisory
- www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlnvdThird Party Advisory
- www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.htmlnvdThird Party Advisory
- www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlnvdThird Party Advisory
- www.securityfocus.com/bid/91787nvdThird Party Advisory
- www.ubuntu.com/usn/USN-2673-1nvdThird Party Advisory
- developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.19_release_notesnvdRelease Notes
- smacktls.comnvdTechnical Description
- lists.opensuse.org/opensuse-security-announce/2015-07/msg00025.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2015-07/msg00031.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2015-08/msg00021.htmlnvd
- rhn.redhat.com/errata/RHSA-2015-1185.htmlnvd
- rhn.redhat.com/errata/RHSA-2015-1664.htmlnvd
- www.securityfocus.com/bid/75541nvd
- www.securityfocus.com/bid/83398nvd
- www.securitytracker.com/id/1032783nvd
- www.securitytracker.com/id/1032784nvd
- www.ubuntu.com/usn/USN-2656-1nvd
- www.ubuntu.com/usn/USN-2656-2nvd
- www.ubuntu.com/usn/USN-2672-1nvd
- security.gentoo.org/glsa/201512-10nvd
- security.gentoo.org/glsa/201701-46nvd
News mentions
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