CVE-2012-4187

Description

Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 do not properly manage a certain insPos variable, which allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption and assertion failure) via unspecified vectors.

Category

9.3
CVSS
Severity: Critical
CVSS 2.0 •
EPSS 24.84% Top 5%
Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory mandriva.com Vendor Advisory ubuntu.com Vendor Advisory mozilla.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://secunia.com/advisories/50904 third party advisory
http://secunia.com/advisories/50984 third party advisory
http://secunia.com/advisories/50935 third party advisory
http://secunia.com/advisories/50856 third party advisory
http://secunia.com/advisories/50892 third party advisory
http://rhn.redhat.com/errata/RHSA-2012-1351.html third party advisory vendor advisory
http://secunia.com/advisories/50936 third party advisory
http://www.mozilla.org/security/announce/2012/mfsa2012-86.html vendor advisory
http://secunia.com/advisories/55318 third party advisory
http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00010.html mailing list third party advisory vendor advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2012:163 third party advisory vendor advisory
http://www.securityfocus.com/bid/56125 vdb entry third party advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=787493 issue tracking
http://www.ubuntu.com/usn/USN-1611-1 third party advisory vendor advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16425 vdb entry third party advisory signature

Frequently Asked Questions

What is the severity of CVE-2012-4187?
CVE-2012-4187 has been scored as a critical severity vulnerability.
How to fix CVE-2012-4187?
To fix CVE-2012-4187, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2012-4187 being actively exploited in the wild?
It is possible that CVE-2012-4187 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~25% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.