HOME VULNERABILITIESCVE-2012-3966

CRITICAL

CVE-2012-3966

CWE-119Published: August 29, 2012· Updated: Jun 16, 2026

10.0

CVSS v3.1

Official Description

Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird before 15.0, Thunderbird ESR 10.x before 10.0.7, and SeaMonkey before 2.12 allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a negative height value in a BMP image within a .ICO file, related to (1) improper handling of the transparency bitmask by the nsICODecoder component and (2) improper processing of the alpha channel by the nsBMPDecoder component.

Technical Analysis

CVE-2012-3966 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.

User Interaction

Scope

Impact

ConfidentialityC

IntegrityC

AvailabilityC

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

Affected Vendors & Products

Mozilla4 product(s)

firefoxthunderbirdseamonkeythunderbird esr

Source: NVD CPE · 275 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.mozilla.org/security/announce/2012/mfsa2012-61.html

ADVISORYhttp://www.mozilla.org/security/announce/2012/mfsa2012-61.html

All References (24)

→

http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.html

→

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.html

→

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.html

→

http://rhn.redhat.com/errata/RHSA-2012-1210.html

→

http://rhn.redhat.com/errata/RHSA-2012-1211.html

→

http://www.mozilla.org/security/announce/2012/mfsa2012-61.htmlVendor Advisory

→

http://www.ubuntu.com/usn/USN-1548-1

→

http://www.ubuntu.com/usn/USN-1548-2

→

http://www.xerox.com/download/security/security-bulletin/16287-4d6b7b0c81f7b/cert_XRX13-003_v1.0.pdf

→

https://bugzilla.mozilla.org/show_bug.cgi?id=775793

→

https://bugzilla.mozilla.org/show_bug.cgi?id=775794

→

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16246

→

http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.html

→

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.html

→

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.html

Quick Facts

CVE IDCVE-2012-3966

CVSS Score10.0 / 10

SeverityCRITICAL

WeaknessCWE-119

CISA KEVNo

Affected1 vendor(s)

PublishedAug 29, 2012

Related CVEs (CWE-119)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2012-3966 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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