Description
Mozilla Network Security Services (NSS) before 3.15.4, as used in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, SeaMonkey before 2.24, and other products, does not properly restrict public values in Diffie-Hellman key exchanges, which makes it easier for remote attackers to bypass cryptographic protection mechanisms in ticket handling by leveraging use of a certain value.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | nss | 2:3.15.4-1 | — |
| Debian 13 | nss | 2:3.15.4-1 | — |
| Debian 12 | nss | 2:3.15.4-1 | — |
| Debian 7 | iceweasel | 24.3.0esr-1~deb7u1 | DSA-2858-1 |
| Debian 7 | nss | 2:3.14.5-1+deb7u1 | DSA-2994-1 |
| Debian 6.0 | nss | 3.12.8-1+squeeze8 | DLA-23-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | nspr +1 | 4.10.6-1.el6_5 | RHSA-2014:0917 |
| RHEL 6 | nss +4 | 3.16.1-4.el6_5 | RHSA-2014:0917 |
| RHEL 6 | nss-util +1 | 3.16.1-1.el6_5 | RHSA-2014:0917 |
| RHEL 6 | rhev-hypervisor6 | 6.5-20140725.0.el6ev | RHSA-2014:0979 |
| RHEL 5 | nss +3 | 3.16.1-2.el5 | RHSA-2014:1246 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 45.5.1-1.1 | openSUSE-SU-2024:10230-1 |
| openSUSE Tumbleweed | mozilla-nss | 3.26.2-1.1 | openSUSE-SU-2024:10451-1 |
Advisories 9
- RHSA-2014:1246 Red Hat Security Advisory: nss and nspr security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0979 Red Hat Security Advisory: rhev-hypervisor6 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0917 Red Hat Security Advisory: nss and nspr security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2994-1 nss - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-23-1 nss - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2858-1 iceweasel - several Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10451-1 libfreebl3-3.26.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10230-1 MozillaThunderbird-45.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10071-1 MozillaFirefox-50.1.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- USN-2119-1 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- 1029721 vdb-entry
- http://hg.mozilla.org/projects/nss/rev/12c42006aed8
- openSUSE-SU-2014:0212 vendor-advisory
- firefox-nss-cve20141491-unspecified(90886) vdb-entry
- 1029717 vdb-entry
- http://www.vmware.com/security/advisories/VMSA-2014-0012.html
- DSA-2994 vendor-advisory
- 65332 vdb-entry
- 56922 third-party-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=934545
- 1029720 vdb-entry
- 56858 third-party-advisory
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
- DSA-2858 vendor-advisory
- 20141205 NEW: VMSA-2014-0012 - VMware vSphere product updates address security vulnerabilities mailing-list
- http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
- USN-2102-2 vendor-advisory
- GLSA-201504-01 vendor-advisory
- http://www.mozilla.org/security/announce/2014/mfsa2014-12.html
- http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
- 20141205 NEW: VMSA-2014-0012 - VMware vSphere product updates address security vulnerabilities mailing-list
- 56888 third-party-advisory
- FEDORA-2014-2083 vendor-advisory
- openSUSE-SU-2014:0419 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/cpuoct2014-1972960.html
- FEDORA-2014-2041 vendor-advisory
- SUSE-SU-2014:0248 vendor-advisory
- openSUSE-SU-2014:0213 vendor-advisory
- USN-2102-1 vendor-advisory