Skip to content
Fencer Vulns
critical 9.3

CVE-2009-3979 json

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, SeaMonkey before 2.0.1,…

published 2009-12-17 16 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3950

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.0%
EPSS 4.0% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, SeaMonkey before 2.0.1, and Thunderbird allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Patch / fix

  • thunderbird RHEL 4 1.5.0.12-25.el4
  • thunderbird RHEL 5 PRODUCTIVITY, RHEL 5 2.0.0.24-2.el5_4
  • firefox RHEL 4 3.0.16-4.el4
  • firefox RHEL 5 3.0.16-1.el5_4
  • xulrunner RHEL 5 1.9.0.16-2.el5_4
  • xulrunner-devel-unstable RHEL 5 1.9.0.16-2.el5_4
  • seamonkey RHEL 3 1.0.9-0.48.el3
  • seamonkey RHEL 4 1.0.9-51.el4_8

red hat advisories RHSA-2010:0154RHSA-2010:0153RHSA-2009:1674RHSA-2009:1673

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

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

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-2009-3979 updated cvss 6.8

Mozilla crash with evidence of memory corruption

  • Red Hat Desktop version 3 seamonkey 1.0.9-0.48.el3, seamonkey-nss 1.0.9-0.48.el3, seamonkey-chat 1.0.9-0.48.el3, seamonkey-mail 1.0.9-0.48.el3, seamonkey-nspr 1.0.9-0.48.el3, seamonkey-js-debugger 1.0.9-0.48.el3, +1 more
    fixed: vendor fix RHSA-2009:1673
  • Red Hat Enterprise Linux (v. 5 server) firefox 3.0.16-1.el5_4, xulrunner 1.9.0.16-2.el5_4, xulrunner-devel-unstable 1.9.0.16-2.el5_4
    fixed: vendor fix RHSA-2009:1674
  • Red Hat Enterprise Linux AS version 3 seamonkey 1.0.9-0.48.el3, seamonkey-nss 1.0.9-0.48.el3, seamonkey-chat 1.0.9-0.48.el3, seamonkey-mail 1.0.9-0.48.el3, seamonkey-nspr 1.0.9-0.48.el3, seamonkey-js-debugger 1.0.9-0.48.el3, +1 more Red Hat Enterprise Linux AS version 4 firefox 3.0.16-4.el4, seamonkey 1.0.9-51.el4_8, thunderbird 1.5.0.12-25.el4, seamonkey-chat 1.0.9-51.el4_8, seamonkey-mail 1.0.9-51.el4_8, seamonkey-js-debugger 1.0.9-51.el4_8, +1 more
    fixed: vendor fix RHSA-2009:1673
  • Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.0.16-1.el5_4, xulrunner 1.9.0.16-2.el5_4, thunderbird 2.0.0.24-2.el5_4, xulrunner-devel-unstable 1.9.0.16-2.el5_4
    fixed: vendor fix RHSA-2009:1674
  • Red Hat Enterprise Linux Desktop version 4 firefox 3.0.16-4.el4, seamonkey 1.0.9-51.el4_8, thunderbird 1.5.0.12-25.el4, seamonkey-chat 1.0.9-51.el4_8, seamonkey-mail 1.0.9-51.el4_8, seamonkey-js-debugger 1.0.9-51.el4_8, +1 more
    fixed: vendor fix RHSA-2009:1673
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) xulrunner 1.9.0.16-2.el5_4, xulrunner-devel-unstable 1.9.0.16-2.el5_4
    fixed: vendor fix RHSA-2009:1674
  • Red Hat Enterprise Linux ES version 3 seamonkey 1.0.9-0.48.el3, seamonkey-nss 1.0.9-0.48.el3, seamonkey-chat 1.0.9-0.48.el3, seamonkey-mail 1.0.9-0.48.el3, seamonkey-nspr 1.0.9-0.48.el3, seamonkey-js-debugger 1.0.9-0.48.el3, +1 more Red Hat Enterprise Linux ES version 4 firefox 3.0.16-4.el4, seamonkey 1.0.9-51.el4_8, thunderbird 1.5.0.12-25.el4, seamonkey-chat 1.0.9-51.el4_8, seamonkey-mail 1.0.9-51.el4_8, seamonkey-js-debugger 1.0.9-51.el4_8, +1 more
    fixed: vendor fix RHSA-2009:1673
  • Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird 2.0.0.24-2.el5_4
    fixed: vendor fix RHSA-2010:0153
show 1 more
  • Red Hat Enterprise Linux WS version 3 seamonkey 1.0.9-0.48.el3, seamonkey-nss 1.0.9-0.48.el3, seamonkey-chat 1.0.9-0.48.el3, seamonkey-mail 1.0.9-0.48.el3, seamonkey-nspr 1.0.9-0.48.el3, seamonkey-js-debugger 1.0.9-0.48.el3, +1 more Red Hat Enterprise Linux WS version 4 firefox 3.0.16-4.el4, seamonkey 1.0.9-51.el4_8, thunderbird 1.5.0.12-25.el4, seamonkey-chat 1.0.9-51.el4_8, seamonkey-mail 1.0.9-51.el4_8, seamonkey-js-debugger 1.0.9-51.el4_8, +1 more
    fixed: vendor fix RHSA-2009:1673

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

3.96% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

References

Sources

Fencer Vulns 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.