Skip to content
Fencer Intel
critical 10.0

CVE-2011-2371 in the critical feed json

Integer overflow in the Array.reduceRight method in Mozilla Firefox before 3.6.18 and 4.x through 4.0.1, Thunderbird before 3.1.11, and Sea…

published 2011-06-30 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-2360

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
75.7%
EPSS 75.7% chance of exploitation in 30 days, percentile 99.5%
public exploits
4
Metasploit, Exploit-DB

Summary

Integer overflow in the Array.reduceRight method in Mozilla Firefox before 3.6.18 and 4.x through 4.0.1, Thunderbird before 3.1.11, and SeaMonkey through 2.0.14 allows remote attackers to execute arbitrary code via vectors involving a long JavaScript Array object.

Patch / fix

  • seamonkey RHEL 4 1.0.9-71.el4
  • seamonkey-chat RHEL 4 1.0.9-71.el4
  • seamonkey-mail RHEL 4 1.0.9-71.el4
  • seamonkey-js-debugger RHEL 4 1.0.9-71.el4
  • seamonkey-dom-inspector RHEL 4 1.0.9-71.el4
  • thunderbird RHEL 4 1.5.0.12-39.el4
  • thunderbird RHEL 5 PRODUCTIVITY, RHEL 5 2.0.0.24-18.el5_6
  • firefox RHEL 4 3.6.18-2.el4

red hat advisories RHSA-2011:0888RHSA-2011:0887RHSA-2011:0885

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1
  • MozillaThunderbird openSUSE Tumbleweed 45.5.1-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10071-1openSUSE-SU-2024:10230-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-2371 updated cvss 6.8

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

  • Red Hat Enterprise Linux 6 thunderbird
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5.6.z server) firefox 3.6.18-1.el5_6, xulrunner 1.9.2.18-2.el5_6 Red Hat Enterprise Linux AS version 4 firefox 3.6.18-2.el4, seamonkey 1.0.9-71.el4, seamonkey-chat 1.0.9-71.el4, seamonkey-mail 1.0.9-71.el4, thunderbird 1.5.0.12-39.el4, seamonkey-js-debugger 1.0.9-71.el4, +1 more
    fixed: vendor fix RHSA-2011:0885
  • Red Hat Enterprise Linux Desktop (v. 5 client) thunderbird 2.0.0.24-18.el5_6
    fixed: vendor fix RHSA-2011:0887
  • Red Hat Enterprise Linux Desktop version 4 firefox 3.6.18-2.el4, seamonkey 1.0.9-71.el4, seamonkey-chat 1.0.9-71.el4, seamonkey-mail 1.0.9-71.el4, thunderbird 1.5.0.12-39.el4, seamonkey-js-debugger 1.0.9-71.el4, +1 more Red Hat Enterprise Linux ES version 4 firefox 3.6.18-2.el4, seamonkey 1.0.9-71.el4, seamonkey-chat 1.0.9-71.el4, seamonkey-mail 1.0.9-71.el4, thunderbird 1.5.0.12-39.el4, seamonkey-js-debugger 1.0.9-71.el4, +1 more
    fixed: vendor fix RHSA-2011:0885
  • Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird 2.0.0.24-18.el5_6
    fixed: vendor fix RHSA-2011:0887
  • Red Hat Enterprise Linux Server (v. 6) firefox 3.6.18-1.el6_1, xulrunner 1.9.2.18-2.el6_1 Red Hat Enterprise Linux Server Optional (v. 6) xulrunner 1.9.2.18-2.el6_1 Red Hat Enterprise Linux WS version 4 firefox 3.6.18-2.el4, seamonkey 1.0.9-71.el4, seamonkey-chat 1.0.9-71.el4, seamonkey-mail 1.0.9-71.el4, thunderbird 1.5.0.12-39.el4, seamonkey-js-debugger 1.0.9-71.el4, +1 more
    fixed: vendor fix RHSA-2011:0885

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (Metasploit exploit/windows/browser/mozilla_reduceright)
  2. Published

Exploit prediction

75.69% chance of exploitation in the next 30 days, higher than 99.5% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.