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Fencer Vulns
critical 9.3

CVE-2009-0774 json

The layout engine in Mozilla Firefox 2 and 3 before 3.0.7, Thunderbird before 2.0.0.21, and SeaMonkey 1.1.15 allows remote attackers to cau…

published 2009-03-05 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-0774

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

The layout engine in Mozilla Firefox 2 and 3 before 3.0.7, Thunderbird before 2.0.0.21, and SeaMonkey 1.1.15 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via vectors related to gczeal, a different vulnerability than CVE-2009-0773.

Patch / fix

  • seamonkey RHEL 2.1 1.0.9-0.30.el2
  • seamonkey RHEL 3 1.0.9-0.34.el3
  • seamonkey RHEL 4 1.0.9-38.el4
  • seamonkey-nss RHEL 2.1 1.0.9-0.30.el2
  • seamonkey-nss RHEL 3 1.0.9-0.34.el3
  • seamonkey-chat RHEL 2.1 1.0.9-0.30.el2
  • seamonkey-chat RHEL 3 1.0.9-0.34.el3
  • seamonkey-chat RHEL 4 1.0.9-38.el4

red hat advisories RHSA-2009:0325RHSA-2009:0315RHSA-2009:0258

  • 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-2009-0774 updated cvss 6.8

Firefox 2 and 3 crashes in the JavaScript engine

  • Red Hat Desktop version 3 seamonkey 1.0.9-0.34.el3, seamonkey-nss 1.0.9-0.34.el3, seamonkey-chat 1.0.9-0.34.el3, seamonkey-mail 1.0.9-0.34.el3, seamonkey-nspr 1.0.9-0.34.el3, seamonkey-js-debugger 1.0.9-0.34.el3, +1 more
    fixed: vendor fix RHSA-2009:0325
  • Red Hat Enterprise Linux (v. 5 server) firefox 3.0.7-1.el5, xulrunner 1.9.0.7-1.el5, xulrunner-devel-unstable 1.9.0.7-1.el5
    fixed: vendor fix RHSA-2009:0315
  • Red Hat Enterprise Linux AS (Advanced Server) version 2.1 seamonkey 1.0.9-0.30.el2, seamonkey-nss 1.0.9-0.30.el2, seamonkey-chat 1.0.9-0.30.el2, seamonkey-mail 1.0.9-0.30.el2, seamonkey-nspr 1.0.9-0.30.el2, seamonkey-js-debugger 1.0.9-0.30.el2, +1 more Red Hat Enterprise Linux AS version 3 seamonkey 1.0.9-0.34.el3, seamonkey-nss 1.0.9-0.34.el3, seamonkey-chat 1.0.9-0.34.el3, seamonkey-mail 1.0.9-0.34.el3, seamonkey-nspr 1.0.9-0.34.el3, seamonkey-js-debugger 1.0.9-0.34.el3, +1 more Red Hat Enterprise Linux AS version 4 firefox 3.0.7-1.el4, seamonkey 1.0.9-38.el4, seamonkey-chat 1.0.9-38.el4, seamonkey-mail 1.0.9-38.el4, thunderbird 1.5.0.12-19.el4, seamonkey-js-debugger 1.0.9-38.el4, +1 more
    fixed: vendor fix RHSA-2009:0325
  • Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.0.7-1.el5, xulrunner 1.9.0.7-1.el5, thunderbird 2.0.0.21-1.el5, xulrunner-devel-unstable 1.9.0.7-1.el5
    fixed: vendor fix RHSA-2009:0315
  • Red Hat Enterprise Linux Desktop version 4 firefox 3.0.7-1.el4, seamonkey 1.0.9-38.el4, seamonkey-chat 1.0.9-38.el4, seamonkey-mail 1.0.9-38.el4, thunderbird 1.5.0.12-19.el4, seamonkey-js-debugger 1.0.9-38.el4, +1 more
    fixed: vendor fix RHSA-2009:0325
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) xulrunner 1.9.0.7-1.el5, xulrunner-devel-unstable 1.9.0.7-1.el5
    fixed: vendor fix RHSA-2009:0315
  • Red Hat Enterprise Linux ES version 2.1 seamonkey 1.0.9-0.30.el2, seamonkey-nss 1.0.9-0.30.el2, seamonkey-chat 1.0.9-0.30.el2, seamonkey-mail 1.0.9-0.30.el2, seamonkey-nspr 1.0.9-0.30.el2, seamonkey-js-debugger 1.0.9-0.30.el2, +1 more Red Hat Enterprise Linux ES version 3 seamonkey 1.0.9-0.34.el3, seamonkey-nss 1.0.9-0.34.el3, seamonkey-chat 1.0.9-0.34.el3, seamonkey-mail 1.0.9-0.34.el3, seamonkey-nspr 1.0.9-0.34.el3, seamonkey-js-debugger 1.0.9-0.34.el3, +1 more Red Hat Enterprise Linux ES version 4 firefox 3.0.7-1.el4, seamonkey 1.0.9-38.el4, seamonkey-chat 1.0.9-38.el4, seamonkey-mail 1.0.9-38.el4, thunderbird 1.5.0.12-19.el4, seamonkey-js-debugger 1.0.9-38.el4, +1 more
    fixed: vendor fix RHSA-2009:0325
  • Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird 2.0.0.21-1.el5
    fixed: vendor fix RHSA-2009:0258
show 1 more
  • Red Hat Enterprise Linux WS version 2.1 seamonkey 1.0.9-0.30.el2, seamonkey-nss 1.0.9-0.30.el2, seamonkey-chat 1.0.9-0.30.el2, seamonkey-mail 1.0.9-0.30.el2, seamonkey-nspr 1.0.9-0.30.el2, seamonkey-js-debugger 1.0.9-0.30.el2, +1 more Red Hat Enterprise Linux WS version 3 seamonkey 1.0.9-0.34.el3, seamonkey-nss 1.0.9-0.34.el3, seamonkey-chat 1.0.9-0.34.el3, seamonkey-mail 1.0.9-0.34.el3, seamonkey-nspr 1.0.9-0.34.el3, seamonkey-js-debugger 1.0.9-0.34.el3, +1 more Red Hat Enterprise Linux WS version 4 firefox 3.0.7-1.el4, seamonkey 1.0.9-38.el4, seamonkey-chat 1.0.9-38.el4, seamonkey-mail 1.0.9-38.el4, thunderbird 1.5.0.12-19.el4, seamonkey-js-debugger 1.0.9-38.el4, +1 more Red Hat Linux Advanced Workstation 2.1 seamonkey 1.0.9-0.30.el2, seamonkey-nss 1.0.9-0.30.el2, seamonkey-chat 1.0.9-0.30.el2, seamonkey-mail 1.0.9-0.30.el2, seamonkey-nspr 1.0.9-0.30.el2, seamonkey-js-debugger 1.0.9-0.30.el2, +1 more
    fixed: vendor fix RHSA-2009:0325

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

4.05% 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

Classification

Weakness
  • CWE-399 Resource Management Errors

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.