Home/CVE/Mozilla Network Security Services (NSS) before 3.12.3, Firefox before 3.0.13, Thunderbird before 2.0.0.23, and SeaMonkey
CVE

CVE-2009-2408

Mozilla Network Security Services (NSS) before 3.12.3, Firefox before 3.0.13, Thunderbird before 2.0.0.23, and SeaMonkey

Mozilla Network Security Services (NSS) before 3.12.3, Firefox before 3.0.13, Thunderbird before 2.0.0.23, and SeaMonkey before 1.1.18 do not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority. NOTE: this was originally reported for Firefox before 3.5.

MEDIUM · CVSS 5.9 EPSS 0.01855
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-295Improper Certificate Validation
▤

Affected Products & Versions

9
mozilla firefox< 3.0.13
mozilla network security services< 3.12.3
mozilla seamonkey< 1.1.18
mozilla thunderbird< 2.0.0.23
opensuse>= 10.3 and <= 11.1
suse linux enterpriseall versions
suse linux enterprise serverall versions
debian linuxall versions
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSQLite Firefox Profile Data DB Access
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD30 Jul 2009 · 07:30 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

30
suse-csafopenSUSE-SU-2025:15713-1
suse-csafopenSUSE-SU-2024:14434-1
suse-csafopenSUSE-SU-2024:14109-1
suse-csafopenSUSE-SU-2024:10030-1
suse-csafopenSUSE-SU-2024:10048-1
🔗

References & Sources

30
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://isc.sans.org/diary.html?storyid=7003Broken Link
http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.htmlMailing List
http://marc.info/?l=oss-security&m=125198917018936&w=2Mailing List
http://osvdb.org/56723Broken Link
http://secunia.com/advisories/36088Broken LinkVendor Advisory
http://secunia.com/advisories/36125Broken LinkVendor Advisory
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