Description
Heap-based buffer overflow in a regular-expression parser in Mozilla Network Security Services (NSS) before 3.12.3, as used in Firefox, Thunderbird, SeaMonkey, Evolution, Pidgin, and AOL Instant Messenger (AIM), allows remote SSL servers to cause a denial of service (application crash) or possibly execute arbitrary code via a long domain name in the subject's Common Name (CN) field of an X.509 certificate, related to the cert_TestHostName function.
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 | 3.12.3-1 | — |
| Debian 13 | nss | 3.12.3-1 | — |
| Debian 12 | nss | 3.12.3-1 | — |
| Debian 5.0 | icedove | 2.0.0.24-0lenny1 | DSA-2025-1 |
| Debian 5.0 | nss | 3.12.3.1-0lenny1 | DSA-1874-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | nspr +1 | 4.7.4-1.el5_3.1 | RHSA-2009:1186 |
| RHEL 5 | nss +3 | 3.12.3.99.3-1.el5_3.2 | RHSA-2009:1186 |
| RHEL 4 | nspr +1 | 4.7.4-1.el4_8.1 | RHSA-2009:1184 |
| RHEL 4 | nss +2 | 3.12.3.99.3-1.el4_8.2 | RHSA-2009:1184 |
| RHEL 3 | seamonkey +9 | 1.0.9-0.41.el3 | RHSA-2009:1185 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5.2 EUS | nspr +1 | 4.7.4-1.el5_2 | RHSA-2009:1207 |
| RHEL 5.2 EUS | nss +3 | 3.12.3.99.3-1.el5_2 | RHSA-2009:1207 |
| RHEL 4.7 EUS | nspr +1 | 4.7.4-1.el4_7.1 | RHSA-2009:1190 |
| RHEL 4.7 EUS | nss +1 | 3.12.3.99.3-1.el4_7.6 | RHSA-2009:1190 |
Advisories 7
- RHSA-2009:1207 Red Hat Security Advisory: nspr and nss security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2009:1190 Red Hat Security Advisory: nspr and nss security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2009:1186 Red Hat Security Advisory: nspr and nss security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2009:1184 Red Hat Security Advisory: nspr and nss security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2009:1185 Red Hat Security Advisory: seamonkey security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2025-1 icedove - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1874-1 nss - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://www.blackhat.com/presentations/bh-usa-09/MARLINSPIKE/BHUSA09-Marlinspike-DefeatSSL-SLIDES.pdf
- 36139 third-party-advisory
- 36102 third-party-advisory
- 36157 third-party-advisory
- TA10-103B third-party-advisory
- oval:org.mitre.oval:def:11174 vdb-entry signature
- MDVSA-2009:197 vendor-advisory
- oval:org.mitre.oval:def:8658 vdb-entry signature
- SUSE-SA:2009:048 vendor-advisory
- MDVSA-2009:216 vendor-advisory
- RHSA-2009:1185 vendor-advisory
- 39428 third-party-advisory
- 36434 third-party-advisory
- 36088 third-party-advisory
- http://www.mozilla.org/security/announce/2009/mfsa2009-43.html
- 35891 vdb-entry
- RHSA-2009:1207 vendor-advisory
- 1021699 vendor-advisory
- USN-810-1 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/cpuapr2010-099504.html
- USN-810-2 vendor-advisory
- 1021030 vendor-advisory
- 36125 third-party-advisory
- 37098 third-party-advisory
- 273910 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=512912
- ADV-2009-2085 vdb-entry
- DSA-1874 vendor-advisory