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CVE-2011-2371

86
FAUCET Score

CVE-2011-2371 describes an integer overflow vulnerability in the Array.reduceRight method affecting Mozilla Firefox (before 3.6.18 and 4.x through 4.0.1), Thunderbird (before 3.1.11), and SeaMonkey (through 2.0.14). This critical flaw, rated with a CVSS score of 10.0, allows unauthenticated remote attackers to execute arbitrary code with low attack complexity. While not listed on CISA's KEV catalog, exploit modules are publicly available in Metasploit and ExploitDB, indicating a high potential for exploitation. Despite the availability of exploit code, there is no 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

10.0HIGH

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

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

Exploit Intelligence

EPSS Score
75.69%
Probability of exploitation in next 30 days
EPSS Percentile
99.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Metasploit: Mozilla Firefox Array.reduceRight() Integer Overflow · Jun 21, 2011
ExploitDB: EDB-18531 · Feb 27, 2012
This CVE's current EPSS score of 0.7569 is in the 99th percentile among its peer group of 51,466 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 (10)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xulrunner-0:1.9.2.18-2.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
mozillavendor investigatingvia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird

Vendor Advisories (1)

redhatCVE-2011-2371Critical

Mozilla Integer overflow and arbitrary code execution (MFSA 2011-22)

Jun 21, 2011

References

lists.opensuse.org / opensuse-security-announce/2011-07/msg00001.html
bugzilla.mozilla.org / show_bug.cgi
secunia.com / advisories/45002
securityreason.com / securityalert/8472
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13987
support.avaya.com / css/P8/documents/100144854
support.avaya.com / css/P8/documents/100145333
debian.org / security/2011/dsa-2268
debian.org / security/2011/dsa-2269
debian.org / security/2011/dsa-2273
mandriva.com / security/advisories
mozilla.org / security/announce/2011/mfsa2011-22.html
Vendor Advisory
redhat.com / support/errata/RHSA-2011-0885.html
redhat.com / support/errata/RHSA-2011-0887.html
redhat.com / support/errata/RHSA-2011-0888.html
ubuntu.com / usn/USN-1149-1