The mozilla::net::FailDelayManager::Lookup function in the WebSockets implementation in…
Priority MEDIUM 47CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
The mozilla::net::FailDelayManager::Lookup function in the WebSockets implementation in Mozilla Firefox before 16.0.1, Thunderbird before 16.0.1, and SeaMonkey before 2.13.1 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors.
Why it matters now
EPSS 0.03869 90th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 16.0.1 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:* | before 2.13.1 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 16.0.1 | Vulnerable | Mozilla |
| cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:* | 10.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:* | 11.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:* | 11.10 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* | 12.04 | Vulnerable | Canonical |
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 16.0.1 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:* Versions before 2.13.1 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 16.0.1 Vulnerable ·Mozilla
- cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:* Versions 10.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:* Versions 11.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:* Versions 11.10 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* Versions 12.04 Vulnerable ·Canonical
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Critical. Red Hat's page for this CVE →
Not affected: 2 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2012-4191
- 2026-10-03 Alias added: GHSA-xrwr-pg2p-3r5m
- 2026-10-14 EPSS moved to the 90th–95th percentile
References
Sources
- CVE-2012-4191 · CVE Program
- CVE-2012-4191 · NVD
- FIRST EPSS
- GHSA-xrwr-pg2p-3r5m · GitHub Advisory Database · CC BY 4.0
- CVE-2012-4191 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences