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CVE-2012-1941

31
FAUCET Score

CVE-2012-1941 describes a heap-based buffer overflow vulnerability in Mozilla Firefox, Thunderbird, and SeaMonkey versions. This flaw, residing in the nsHTMLReflowState::CalculateHypotheticalBox function, allows remote attackers to execute arbitrary code by manipulating window resizing with specific HTML elements. With a CVSS score of 9.3, this vulnerability is critical, requiring medium attack complexity but leading to complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the potential impact remains severe.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:beta1:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:beta10:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:beta11:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:beta12:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.85%
Probability of exploitation in next 30 days
EPSS Percentile
91.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0485 is in the 58th percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:10.0.5-2.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:10.0.5-1.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:10.0.5-1.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:10.0.5-2.el6_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:10.0.5-1.el6_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xulrunner-0:10.0.5-1.el6_2
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2012-1941Critical

Mozilla: Buffer overflow and use-after-free issues found using Address Sanitizer (MFSA 2012-40)

Jun 5, 2012

References

lists.opensuse.org / opensuse-security-announce/2012-06/msg00012.html
lists.opensuse.org / opensuse-security-announce/2012-06/msg00015.html
rhn.redhat.com / errata/RHSA-2012-0710.html
rhn.redhat.com / errata/RHSA-2012-0715.html
bugzilla.mozilla.org / show_bug.cgi
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16985
mandriva.com / security/advisories
mozilla.org / security/announce/2012/mfsa2012-40.html
Vendor Advisory