HOME VULNERABILITIESCVE-2012-3957

CRITICAL

CVE-2012-3957

CWE-787Published: August 29, 2012· Updated: Jun 16, 2026

10.0

CVSS v3.1

Official Description

Heap-based buffer overflow in the nsBlockFrame::MarkLineDirty function in 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 allows remote attackers to execute arbitrary code via unspecified vectors.

Technical Analysis

CVE-2012-3957 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-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

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

Canonical1 product(s)

ubuntu linux

Mozilla4 product(s)

firefoxseamonkeythunderbirdthunderbird esr

openSUSE1 product(s)

opensuse

Red Hat5 product(s)

enterprise linux desktopenterprise linux eusenterprise linux serverenterprise linux server eusenterprise linux workstation

SUSE3 product(s)

linux enterprise desktoplinux enterprise serverlinux enterprise software development kit

Source: NVD CPE · 22 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://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.html

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

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

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

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

ADVISORYhttp://www.mozilla.org/security/announce/2012/mfsa2012-58.html

ADVISORYhttp://www.securityfocus.com/bid/55341

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

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

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

ADVISORYhttps://bugzilla.mozilla.org/show_bug.cgi?id=774548

ADVISORYhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16940

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

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

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

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

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

ADVISORYhttp://www.mozilla.org/security/announce/2012/mfsa2012-58.html

ADVISORYhttp://www.securityfocus.com/bid/55341

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

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

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

ADVISORYhttps://bugzilla.mozilla.org/show_bug.cgi?id=774548

ADVISORYhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16940

All References (24)

→

http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.htmlMailing List · Third Party Advisory

→

http://rhn.redhat.com/errata/RHSA-2012-1210.htmlThird Party Advisory

→

http://rhn.redhat.com/errata/RHSA-2012-1211.htmlThird Party Advisory

→

http://www.mozilla.org/security/announce/2012/mfsa2012-58.htmlVendor Advisory

→

http://www.securityfocus.com/bid/55341Third Party Advisory · VDB Entry

→

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

→

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

→

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

→

https://bugzilla.mozilla.org/show_bug.cgi?id=774548Issue Tracking · Vendor Advisory

→

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16940Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.htmlMailing List · Third Party Advisory

Quick Facts

CVE IDCVE-2012-3957

CVSS Score10.0 / 10

SeverityCRITICAL

WeaknessCWE-787

CISA KEVNo

Affected5 vendor(s)

PublishedAug 29, 2012

Related CVEs (CWE-787)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2012-3957 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.

← All Vulnerabilities·Search for CVE-2012-3957·NVD