Description
The cert_TestHostName function in lib/certdb/certdb.c in the certificate-checking implementation in Mozilla Network Security Services (NSS) before 3.16 accepts a wildcard character that is embedded in an internationalized domain name's U-label, which might allow man-in-the-middle attackers to spoof SSL servers via a crafted certificate.
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 | 2:3.16-1 | — |
| Debian 13 | nss | 2:3.16-1 | — |
| Debian 12 | nss | 2:3.16-1 | — |
| Debian 7 | nss | 2:3.14.5-1+deb7u1 | DSA-2994-1 |
| Debian 6.0 | nss | 3.12.8-1+squeeze8 | DLA-23-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 29.0+build1-0ubuntu0.14.04.2 | USN-2185-1 |
| Ubuntu 14.04 LTS | nss | 2:3.15.4-1ubuntu7 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | nss +4 | 3.16.2-2.el7_0 | RHSA-2014:1073 |
| RHEL 7 | nss-util +5 | 3.16.2-1.el7_0 | RHSA-2014:1073 |
| 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 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 | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Tumbleweed | mozilla-nss | 3.26.2-1.1 | openSUSE-SU-2024:10451-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | nss +4 | 3.16.2-2.0.1.el7_0 | ELSA-2014-1073 |
| Oracle Linux 7 | nss-util +5 | 3.16.2-1.el7_0 | ELSA-2014-1073 |
Advisories 10
- 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-2014:1073 Red Hat Security Advisory: nss, nss-util, nss-softokn security, bug fix, and enhancement 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
- USN-2185-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 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
- openSUSE-SU-2024:10451-1 libfreebl3-3.26.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 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
- ELSA-2014-1073 Low: nss, nss-util, nss-softokn security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 18, 2014
References
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.vmware.com/security/advisories/VMSA-2014-0012.html
- DSA-2994 vendor-advisory
- openSUSE-SU-2014:0599 vendor-advisory
- openSUSE-SU-2014:0629 vendor-advisory
- https://developer.mozilla.org/en-US/docs/NSS/NSS_3.16_release_notes
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
- http://www.mozilla.org/security/announce/2014/mfsa2014-45.html
- 20141205 NEW: VMSA-2014-0012 - VMware vSphere product updates address security vulnerabilities mailing-list
- http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
- SUSE-SU-2014:0727 vendor-advisory
- 60621 third-party-advisory
- 60794 third-party-advisory
- GLSA-201504-01 vendor-advisory
- 59866 third-party-advisory
- http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
- https://bugzilla.mozilla.org/show_bug.cgi?id=903885
- 20141205 NEW: VMSA-2014-0012 - VMware vSphere product updates address security vulnerabilities mailing-list
- SUSE-SU-2014:0665 vendor-advisory
- https://hg.mozilla.org/projects/nss/rev/709d4e597979
- http://www.oracle.com/technetwork/topics/security/cpuoct2014-1972960.html
- USN-2185-1 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1079851
- 66356 vdb-entry
- USN-2159-1 vendor-advisory
- FEDORA-2014-5829 vendor-advisory