CVE-2012-3989

Name: CVE-2012-3989
Creator: NVD / NIST
Published: 2012-10-10T17:55:01.847+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.46%

Last modified Jun 16, 2026

CVE-2012-3989 is a vulnerability of currently unknown severity. Mozilla Firefox before 16.0, Thunderbird before 16.0, and SeaMonkey before 2.13 do not properly perform a cast of an unspecified variable during use of the instanceof operator on a JavaScript object, which allows remote attackers to execute arbitrary code or cause a denial of service (assertion failure) via a crafted web site.. EPSS estimates a 3.46% chance of exploitation in the next 30 days.

Description

Mozilla Firefox before 16.0, Thunderbird before 16.0, and SeaMonkey before 2.13 do not properly perform a cast of an unspecified variable during use of the instanceof operator on a JavaScript object, which allows remote attackers to execute arbitrary code or cause a denial of service (assertion failure) via a crafted web site.

Metrics

EPSS Probability

3.46%

87.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions	Update
Mozilla	Firefox	< 16.0	—
Mozilla	Seamonkey	< 2.13	—
Mozilla	Thunderbird	< 16.0	—
Canonical	Ubuntu Linux	10.04	—
Canonical	Ubuntu Linux	11.04	—
Canonical	Ubuntu Linux	11.10	—
Canonical	Ubuntu Linux	12.04	—
Suse	Linux Enterprise Desktop	10	Sp4
Suse	Linux Enterprise Desktop	11	Sp2
Suse	Linux Enterprise Server	10	Sp4
Suse	Linux Enterprise Server	11	Sp2

References

http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00010.htmlMailing List, Third Party Advisory
http://osvdb.org/86097Broken Link
http://secunia.com/advisories/50856Broken Link
http://secunia.com/advisories/50892Broken Link
http://secunia.com/advisories/50904Broken Link
http://secunia.com/advisories/50935Broken Link
http://secunia.com/advisories/50984Broken Link
http://www.mozilla.org/security/announce/2012/mfsa2012-80.htmlVendor Advisory
http://www.ubuntu.com/usn/USN-1611-1Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=783867Issue Tracking, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16814Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00010.htmlMailing List, Third Party Advisory
http://osvdb.org/86097Broken Link
http://secunia.com/advisories/50856Broken Link
http://secunia.com/advisories/50892Broken Link
http://secunia.com/advisories/50904Broken Link
http://secunia.com/advisories/50935Broken Link
http://secunia.com/advisories/50984Broken Link
http://www.mozilla.org/security/announce/2012/mfsa2012-80.htmlVendor Advisory
http://www.ubuntu.com/usn/USN-1611-1Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=783867Issue Tracking, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16814Third Party Advisory

Timeline

Published: Oct 10, 2012
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2012-3989?

How severe is CVE-2012-3989?

Severity scoring for CVE-2012-3989 is pending analysis. The EPSS model estimates a 3.46% probability of exploitation in the next 30 days.

How do I fix CVE-2012-3989?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2012-3989?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST