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Vulnerability record · CVE-2008-5014 · published 13 November 2008

CVE-2008-5014: Mozilla firefox improper input validation vulnerability

Mozilla · Firefox

jslock.cpp in Mozilla Firefox 3.x before 3.0.2, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by modifying the window.__proto__.__proto__ object in a way that causes a lock on a non-native object, which triggers an assertion failure related to the OBJ_IS_NATIVE function.

10.0 CVSS 2.0 High EPSS 5.9% · top 7.0% CWE-20 · Improper input validation
10.0CVSS 2.0 base score
5.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
76References
16 Jun 2026Last modified by NVD

Description

jslock.cpp in Mozilla Firefox 3.x before 3.0.2, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by modifying the window.__proto__.__proto__ object in a way that causes a lock on a non-native object, which triggers an assertion failure related to the OBJ_IS_NATIVE function.

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

Affected products

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

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00004.html Third Party Advisory
http://secunia.com/advisories/32011 Third Party Advisory
http://secunia.com/advisories/32684 Third Party Advisory
http://secunia.com/advisories/32693 Third Party Advisory
http://secunia.com/advisories/32694 Third Party Advisory
http://secunia.com/advisories/32695 Third Party Advisory
http://secunia.com/advisories/32714 Third Party Advisory
http://secunia.com/advisories/32715 Third Party Advisory
http://secunia.com/advisories/32721 Third Party Advisory
http://secunia.com/advisories/32778 Third Party Advisory
http://secunia.com/advisories/32798 Third Party Advisory
http://secunia.com/advisories/32845 Third Party Advisory
http://secunia.com/advisories/32853 Third Party Advisory
http://secunia.com/advisories/33433 Third Party Advisory
http://secunia.com/advisories/33434 Third Party Advisory
http://secunia.com/advisories/34501 Third Party Advisory
http://sunsolve.sun.com/search/document.do?assetkey=1-26-256408-1 Broken Link
http://ubuntu.com/usn/usn-667-1 Third Party Advisory
http://www.debian.org/security/2008/dsa-1669 Third Party Advisory
http://www.debian.org/security/2008/dsa-1671 Third Party Advisory
http://www.debian.org/security/2009/dsa-1696 Third Party Advisory
http://www.debian.org/security/2009/dsa-1697 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2008:228 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2008:230 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2008:235 Third Party Advisory
http://www.mozilla.org/security/announce/2008/mfsa2008-50.html Vendor Advisory
http://www.redhat.com/support/errata/RHSA-2008-0976.html Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2008-0977.html Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2008-0978.html Third Party Advisory
http://www.securityfocus.com/bid/32281 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id?1021182 Third Party AdvisoryVDB Entry
http://www.us-cert.gov/cas/techalerts/TA08-319A.html Third Party AdvisoryUS Government Resource
http://www.vupen.com/english/advisories/2008/3146 Third Party Advisory
http://www.vupen.com/english/advisories/2009/0977 Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=436741 Issue TrackingVendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9157 Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00366.html Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00385.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00004.html Third Party Advisory
http://secunia.com/advisories/32011 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2008-5014), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.