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CVE-2011-2377

21
FAUCET Score

CVE-2011-2377 describes a memory corruption vulnerability in Mozilla Firefox (versions before 3.6.18 and 4.x through 4.0.1), Thunderbird (before 3.1.11), and SeaMonkey (through 2.0.14). This flaw allows remote attackers to trigger a denial of service or potentially execute arbitrary code by exploiting a malformed multipart/x-mixed-replace image. The vulnerability has a CVSS score of 5.0, indicating a medium severity, with a low attack complexity and no authentication required, primarily leading to availability impact. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0:alpha:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0:beta:*:*:*:*:*:*
1.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0.1:*:*:*:*:*:*:*
1.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.77%
Probability of exploitation in next 30 days
EPSS Percentile
88.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0377 is in the 85th percentile among its peer group of 23,684 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (10)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:3.1.11-2.el6_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:3.6.18-2.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: thunderbird-0:1.5.0.12-39.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: seamonkey-0:1.0.9-71.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:3.6.18-1.el5_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:1.9.2.18-2.el5_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:2.0.0.24-18.el5_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:3.6.18-1.el6_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xulrunner-0:1.9.2.18-2.el6_1
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2011-2377Critical

Mozilla Crash caused by corrupted JPEG image (MFSA 2011-21)

Jun 22, 2011

References

lists.opensuse.org / opensuse-security-announce/2011-07/msg00001.html
bugzilla.mozilla.org / show_bug.cgi
bugzilla.mozilla.org / show_bug.cgi
secunia.com / advisories/45002
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13872
support.avaya.com / css/P8/documents/100144854
support.avaya.com / css/P8/documents/100145333
mandriva.com / security/advisories
mozilla.org / security/announce/2011/mfsa2011-21.html
Vendor Advisory
redhat.com / support/errata/RHSA-2011-0885.html
redhat.com / support/errata/RHSA-2011-0886.html
redhat.com / support/errata/RHSA-2011-0887.html
redhat.com / support/errata/RHSA-2011-0888.html
ubuntu.com / usn/USN-1149-1