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Vulnerability record · CVE-2012-4204 · published 21 November 2012

CVE-2012-4204: Mozilla firefox memory buffer overflow vulnerability

Mozilla · Firefox

The str_unescape function in the JavaScript engine in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via unspecified vectors.

9.3 CVSS 2.0 High EPSS 5.8% · top 7.2% CWE-119 · Memory buffer overflow
9.3CVSS 2.0 base score
5.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
38References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

The str_unescape function in the JavaScript engine in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via unspecified vectors.

AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

8 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00021.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00022.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00090.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00092.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00093.html Mailing ListThird Party Advisory
http://osvdb.org/87592 Broken Link
http://secunia.com/advisories/51369 Third Party Advisory
http://secunia.com/advisories/51370 Third Party Advisory
http://secunia.com/advisories/51381 Third Party Advisory
http://secunia.com/advisories/51434 Third Party Advisory
http://secunia.com/advisories/51439 Third Party Advisory
http://secunia.com/advisories/51440 Third Party Advisory
http://www.mozilla.org/security/announce/2012/mfsa2012-96.html Vendor Advisory
http://www.ubuntu.com/usn/USN-1636-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-1638-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-1638-2 Third Party Advisory
http://www.ubuntu.com/usn/USN-1638-3 Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=778603 ExploitIssue TrackingPatchVendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16766 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00021.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00022.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00090.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00092.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-11/msg00093.html Mailing ListThird Party Advisory
http://osvdb.org/87592 Broken Link
http://secunia.com/advisories/51369 Third Party Advisory
http://secunia.com/advisories/51370 Third Party Advisory
http://secunia.com/advisories/51381 Third Party Advisory
http://secunia.com/advisories/51434 Third Party Advisory
http://secunia.com/advisories/51439 Third Party Advisory
http://secunia.com/advisories/51440 Third Party Advisory
http://www.mozilla.org/security/announce/2012/mfsa2012-96.html Vendor Advisory
http://www.ubuntu.com/usn/USN-1636-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-1638-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-1638-2 Third Party Advisory
http://www.ubuntu.com/usn/USN-1638-3 Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=778603 ExploitIssue TrackingPatchVendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16766 Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2012-4204), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.