Skip to content
Fencer Vulns
critical 9.3

CVE-2009-3372 json

Mozilla Firefox before 3.0.15 and 3.5.x before 3.5.4, and SeaMonkey before 2.0, allows remote attackers to execute arbitrary code via a cra…

published 2009-10-29 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3354

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

Mozilla Firefox before 3.0.15 and 3.5.x before 3.5.4, and SeaMonkey before 2.0, allows remote attackers to execute arbitrary code via a crafted regular expression in a Proxy Auto-configuration (PAC) file.

Patch / fix

  • firefox RHEL 4 3.0.15-3.el4
  • firefox RHEL 5 3.0.15-3.el5_4
  • nspr RHEL 4 4.7.6-1.el4_8
  • nspr RHEL 5 4.7.6-1.el5_4
  • xulrunner RHEL 5 1.9.0.15-3.el5_4
  • xulrunner-devel-unstable RHEL 5 1.9.0.15-3.el5_4

red hat advisories RHSA-2009:1530

  • 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-2009-3372 updated cvss 5.1

Firefox crash in proxy auto-configuration regexp parsing

  • Red Hat Enterprise Linux (v. 5 server) nspr 4.7.6-1.el5_4, firefox 3.0.15-3.el5_4, xulrunner 1.9.0.15-3.el5_4, xulrunner-devel-unstable 1.9.0.15-3.el5_4 Red Hat Enterprise Linux AS version 4 nspr 4.7.6-1.el4_8, firefox 3.0.15-3.el4 Red Hat Enterprise Linux Desktop (v. 5 client) nspr 4.7.6-1.el5_4, firefox 3.0.15-3.el5_4, xulrunner 1.9.0.15-3.el5_4, xulrunner-devel-unstable 1.9.0.15-3.el5_4 Red Hat Enterprise Linux Desktop version 4 nspr 4.7.6-1.el4_8, firefox 3.0.15-3.el4 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) nspr 4.7.6-1.el5_4, xulrunner 1.9.0.15-3.el5_4, xulrunner-devel-unstable 1.9.0.15-3.el5_4 Red Hat Enterprise Linux ES version 4 nspr 4.7.6-1.el4_8, firefox 3.0.15-3.el4
    +1 more products
    Red Hat Enterprise Linux WS version 4 nspr 4.7.6-1.el4_8, firefox 3.0.15-3.el4
    fixed: vendor fix RHSA-2009:1530

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

3.98% 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.