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Fencer Intel
critical 9.3

CVE-2011-3659 in the critical feed json

Use-after-free vulnerability in Mozilla Firefox before 3.6.26 and 4.x through 9.0, Thunderbird before 3.1.18 and 5.0 through 9.0, and SeaMo…

published 2012-02-01 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3618

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
36.8%
EPSS 36.8% chance of exploitation in 30 days, percentile 98%
public exploits
2
Metasploit, Exploit-DB

Summary

Use-after-free vulnerability in Mozilla Firefox before 3.6.26 and 4.x through 9.0, Thunderbird before 3.1.18 and 5.0 through 9.0, and SeaMonkey before 2.7 might allow remote attackers to execute arbitrary code via vectors related to incorrect AttributeChildRemoved notifications that affect access to removed nsDOMAttribute child nodes.

Patch / fix

  • mozilla firefox 3.6.26, 10.0
  • mozilla seamonkey 2.7
  • mozilla thunderbird 3.1.18, 10.0
  • thunderbird RHEL 6 3.1.18-1.el6_2
  • firefox RHEL 4 3.6.26-2.el4
  • firefox RHEL 5 3.6.26-1.el5_7
  • firefox RHEL 6 3.6.26-1.el6_2
  • xulrunner RHEL 5 1.9.2.26-1.el5_7
  • xulrunner RHEL 6 1.9.2.26-1.el6_2

red hat advisories RHSA-2012:0080RHSA-2012:0079

  • 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-2011-3659 updated cvss 6.8

Mozilla: child nodes from nsDOMAttribute still accessible after removal of nodes (MFSA 2012-04)

  • Red Hat Enterprise Linux (v. 5 server) firefox 3.6.26-1.el5_7, xulrunner 1.9.2.26-1.el5_7 Red Hat Enterprise Linux AS version 4 firefox 3.6.26-2.el4 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.6.26-1.el5_7, xulrunner 1.9.2.26-1.el5_7 Red Hat Enterprise Linux Desktop (v. 6) firefox 3.6.26-1.el6_2, thunderbird 3.1.18-1.el6_2, xulrunner 1.9.2.26-1.el6_2 Red Hat Enterprise Linux Desktop Optional (v. 6) xulrunner 1.9.2.26-1.el6_2 Red Hat Enterprise Linux Desktop version 4 firefox 3.6.26-2.el4
    +8 more products
    Red Hat Enterprise Linux ES version 4 firefox 3.6.26-2.el4 Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 3.6.26-1.el6_2, xulrunner 1.9.2.26-1.el6_2 Red Hat Enterprise Linux Server (v. 6) firefox 3.6.26-1.el6_2, xulrunner 1.9.2.26-1.el6_2 Red Hat Enterprise Linux Server Optional (v. 6) thunderbird 3.1.18-1.el6_2, xulrunner 1.9.2.26-1.el6_2 Red Hat Enterprise Linux Workstation (v. 6) firefox 3.6.26-1.el6_2, thunderbird 3.1.18-1.el6_2, xulrunner 1.9.2.26-1.el6_2 Red Hat Enterprise Linux Workstation Optional (v. 6) xulrunner 1.9.2.26-1.el6_2 Red Hat Enterprise Linux WS version 4 firefox 3.6.26-2.el4 Red Hat RHEL Desktop Workstation (v. 5 client) xulrunner 1.9.2.26-1.el5_7
    fixed: vendor fix RHSA-2012:0079

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_attribchildremoved)
  2. Published

Exploit prediction

36.82% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/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.