CVE-2010-3765

Firefox race condition flaw (MFSA 2010-73)

Published Oct 27, 2010 CVSS 3.1 · 9.8 Critical EPSS 83.2% KEV · Listed
Description
Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x before 2.0.10, when JavaScript is enabled, allows remote attackers to execute arbitrary code via vectors related to nsCSSFrameConstructor::ContentAppended, the appendChild method, incorrect index tracking, and the creation of multiple frames, which triggers memory corruption, as exploited in the wild in October 2010 by the Belmoo malware.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-2124-1 New Xulrunner packages fix several vulnerabilities
Ubuntu USN Ubuntu USN USN-1011-1 Firefox vulnerability
Ubuntu USN Ubuntu USN USN-1011-2 Thunderbird vulnerability
Ubuntu USN Ubuntu USN USN-1011-3 Xulrunner vulnerability
References
Link Providers
http://blog.mozilla.com/security/2010/10/26/critical-vulnerability-in-firefox-3-5-and-firefox-3-6/ cve-icon cve-icon
http://blogs.sun.com/security/entry/multiple_vulnerabilities_in_mozilla_firefox cve-icon cve-icon
http://isc.sans.edu/diary.html?storyid=9817 cve-icon cve-icon
http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050233.html cve-icon cve-icon
http://lists.fedoraproject.org/pipermail/package-announce/2010-October/050061.html cve-icon cve-icon
http://lists.fedoraproject.org/pipermail/package-announce/2010-October/050077.html cve-icon cve-icon
http://lists.fedoraproject.org/pipermail/package-announce/2010-October/050154.html cve-icon cve-icon
http://norman.com/about_norman/press_center/news_archive/2010/129223/en?utm_source=twitterfeed&utm_medium=twitter cve-icon cve-icon
http://secunia.com/advisories/41761 cve-icon cve-icon
http://secunia.com/advisories/41965 cve-icon cve-icon
http://secunia.com/advisories/41966 cve-icon cve-icon
http://secunia.com/advisories/41969 cve-icon cve-icon
http://secunia.com/advisories/41975 cve-icon cve-icon
http://secunia.com/advisories/42003 cve-icon cve-icon
http://secunia.com/advisories/42008 cve-icon cve-icon
http://secunia.com/advisories/42043 cve-icon cve-icon
http://secunia.com/advisories/42867 cve-icon cve-icon
http://slackware.com/security/viewer.php?l=slackware-security&y=2010&m=slackware-security.556706 cve-icon cve-icon
http://support.avaya.com/css/P8/documents/100114329 cve-icon cve-icon
http://support.avaya.com/css/P8/documents/100114335 cve-icon cve-icon
http://www.debian.org/security/2010/dsa-2124 cve-icon cve-icon
http://www.exploit-db.com/exploits/15341 cve-icon cve-icon
http://www.exploit-db.com/exploits/15342 cve-icon cve-icon
http://www.exploit-db.com/exploits/15352 cve-icon cve-icon
http://www.mandriva.com/security/advisories?name=MDVSA-2010:213 cve-icon cve-icon
http://www.mandriva.com/security/advisories?name=MDVSA-2010:219 cve-icon cve-icon
http://www.mozilla.org/security/announce/2010/mfsa2010-73.html cve-icon cve-icon
http://www.norman.com/about_norman/press_center/news_archive/2010/129223/ cve-icon cve-icon
http://www.norman.com/security_center/virus_description_archive/129146/ cve-icon cve-icon
http://www.redhat.com/support/errata/RHSA-2010-0808.html cve-icon cve-icon
http://www.redhat.com/support/errata/RHSA-2010-0809.html cve-icon cve-icon
http://www.redhat.com/support/errata/RHSA-2010-0810.html cve-icon cve-icon
http://www.redhat.com/support/errata/RHSA-2010-0861.html cve-icon cve-icon
http://www.redhat.com/support/errata/RHSA-2010-0896.html cve-icon cve-icon
http://www.securityfocus.com/bid/44425 cve-icon cve-icon
http://www.securitytracker.com/id?1024645 cve-icon cve-icon
http://www.securitytracker.com/id?1024650 cve-icon cve-icon
http://www.securitytracker.com/id?1024651 cve-icon cve-icon
http://www.ubuntu.com/usn/USN-1011-2 cve-icon cve-icon
http://www.ubuntu.com/usn/USN-1011-3 cve-icon cve-icon
http://www.ubuntu.com/usn/usn-1011-1 cve-icon cve-icon
http://www.vupen.com/english/advisories/2010/2837 cve-icon cve-icon
http://www.vupen.com/english/advisories/2010/2857 cve-icon cve-icon
http://www.vupen.com/english/advisories/2010/2864 cve-icon cve-icon
http://www.vupen.com/english/advisories/2010/2871 cve-icon cve-icon
http://www.vupen.com/english/advisories/2011/0061 cve-icon cve-icon
https://bugzilla.mozilla.org/show_bug.cgi?id=607222 cve-icon cve-icon
https://bugzilla.mozilla.org/show_bug.cgi?id=607222#c53 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=646997 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2010-3765 cve-icon
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12108 cve-icon cve-icon
https://rhn.redhat.com/errata/RHSA-2010-0812.html cve-icon cve-icon
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2010-3765 cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2010-3765 cve-icon
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2025-10-06T00:00:00+00:00', 'dueDate': '2025-10-27T00:00:00+00:00'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Oct 22, 2025, 12:05 AM
Reserved
Oct 5, 2010, 12:00 AM
Status
Analyzed
Published
Oct 28, 2010, 12:00 AM
Modified
Jun 16, 2026, 11:23 PM
Severity
Critical
Public date
Oct 28, 2010, 12:00 AM