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Fencer Intel
medium 5.0

CVE-2011-3670 json

Mozilla Firefox before 3.6.26 and 4.x through 6.0, Thunderbird before 3.1.18 and 5.0 through 6.0, and SeaMonkey before 2.4 do not properly…

published 2012-02-01 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3629

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

Mozilla Firefox before 3.6.26 and 4.x through 6.0, Thunderbird before 3.1.18 and 5.0 through 6.0, and SeaMonkey before 2.4 do not properly enforce the IPv6 literal address syntax, which allows remote attackers to obtain sensitive information by making XMLHttpRequest calls through a proxy and reading the error messages.

Patch / fix

  • 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
  • thunderbird RHEL 4 1.5.0.12-46.el4
  • thunderbird RHEL 5 PRODUCTIVITY, RHEL 5 2.0.0.24-28.el5_7

red hat advisories RHSA-2012:0080RHSA-2012:0079RHSA-2012:0085RHSA-2012:0084

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-2011-3670 updated cvss 2.9

Mozilla: Same-origin bypass using IPv6-like hostname syntax (MFSA 2012-02)

  • 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, seamonkey 1.0.9-78.el4, seamonkey-chat 1.0.9-78.el4, seamonkey-mail 1.0.9-78.el4, thunderbird 1.5.0.12-46.el4, seamonkey-js-debugger 1.0.9-78.el4, +1 more Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.6.26-1.el5_7, xulrunner 1.9.2.26-1.el5_7, thunderbird 2.0.0.24-28.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, seamonkey 1.0.9-78.el4, seamonkey-chat 1.0.9-78.el4, seamonkey-mail 1.0.9-78.el4, thunderbird 1.5.0.12-46.el4, seamonkey-js-debugger 1.0.9-78.el4, +1 more
    +8 more products
    Red Hat Enterprise Linux ES version 4 firefox 3.6.26-2.el4, seamonkey 1.0.9-78.el4, seamonkey-chat 1.0.9-78.el4, seamonkey-mail 1.0.9-78.el4, thunderbird 1.5.0.12-46.el4, seamonkey-js-debugger 1.0.9-78.el4, +1 more 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, seamonkey 1.0.9-78.el4, seamonkey-chat 1.0.9-78.el4, seamonkey-mail 1.0.9-78.el4, thunderbird 1.5.0.12-46.el4, seamonkey-js-debugger 1.0.9-78.el4, +1 more Red Hat RHEL Desktop Workstation (v. 5 client) xulrunner 1.9.2.26-1.el5_7
    fixed: vendor fix RHSA-2012:0079
  • Red Hat RHEL Optional Productivity Applications (v. 5 server) thunderbird 2.0.0.24-28.el5_7
    fixed: vendor fix RHSA-2012:0085

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

Exploit prediction

2.14% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

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.