CVE-2012-4191
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.87%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 2.0
- 9.3 HIGHAV:N/AC:M/Au:N/C:C/I:C/A:C
- EPSS
- 3.87% probability · 90th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- mozilla/firefox · mozilla/seamonkey · mozilla/thunderbird · canonical/ubuntu linux
- Source
- cve@mitre.org
EPSS 3.9% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://osvdb.org/86125Broken Link
- http://secunia.com/advisories/50904Third Party Advisory
- http://secunia.com/advisories/50929Third Party Advisory
- http://secunia.com/advisories/50984Third Party Advisory
- http://www.mozilla.org/security/announce/2012/mfsa2012-88.htmlVendor Advisory
- http://www.securitytracker.com/id?1027653Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-1608-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-1611-1Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=798045Issue Tracking, Patch, Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/79209Third Party Advisory, VDB Entry
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16719Third Party Advisory
- http://osvdb.org/86125Broken Link
- http://secunia.com/advisories/50904Third Party Advisory
- http://secunia.com/advisories/50929Third Party Advisory
- http://secunia.com/advisories/50984Third Party Advisory
- http://www.mozilla.org/security/announce/2012/mfsa2012-88.htmlVendor Advisory
- http://www.securitytracker.com/id?1027653Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-1608-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-1611-1Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=798045Issue Tracking, Patch, Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/79209Third Party Advisory, VDB Entry
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16719Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.