Vulnerability in Mozilla Firefox
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 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.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.050 (91.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.057 · newest: 0.050 · change: -0.008
Affected products
- Mozilla Firefox
- Mozilla Network Security Services
- Mozilla Seamonkey
- Mozilla Thunderbird
- Canonical Ubuntu Linux — versions 8.04, 8.10, 9.04
- Debian Linux — versions 5.0
- openSUSE
- SUSE Linux Enterprise — versions 10.0, 11.0
- SUSE Linux Enterprise Server — versions 9
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secunia.com/advisories/36139 (Broken Link, Vendor Advisory, third-party-advisory)
- secunia.com/advisories/36157 (Broken Link, Vendor Advisory, third-party-advisory)
- www.securitytracker.com/id (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- www.mandriva.com/security/advisories (vendor-advisory, Broken Link)
- www.novell.com/linux/security/advisories/2009_48_firefox.html (vendor-advisory, Broken Link)
- www.mandriva.com/security/advisories (vendor-advisory, Broken Link)
- lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html (vendor-advisory, Mailing List)
- secunia.com/advisories/36434 (Broken Link, Vendor Advisory, third-party-advisory)
- secunia.com/advisories/36088 (Broken Link, Vendor Advisory, third-party-advisory)
- isc.sans.org/diary.html (Broken Link)
Frequently asked questions
- What is CVE-2009-2408?
- CVE-2009-2408 is a medium-severity vulnerability in Mozilla Firefox, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2009-07-30.
- How severe is CVE-2009-2408?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2009-2408 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.