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Fencer Vulns
medium 6.8

CVE-2009-3984 json

Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, and SeaMonkey before 2.0.1, allows remote attackers to spoof an SSL indicator for an…

published 2009-12-17 16 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3955

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, and SeaMonkey before 2.0.1, allows remote attackers to spoof an SSL indicator for an http URL or a file URL by setting document.location to an https URL corresponding to a site that responds with a No Content (aka 204) status code and an empty body.

Patch / fix

  • 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
  • seamonkey-nss RHEL 3 1.0.9-0.48.el3
  • seamonkey-chat RHEL 3 1.0.9-0.48.el3

red hat advisories RHSA-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-2009-3984 updated cvss 4.3

Mozilla SSL spoofing with document.location and empty SSL response page

  • 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, 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, seamonkey-dom-inspector 1.0.9-51.el4_8
    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, 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, 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, seamonkey-dom-inspector 1.0.9-51.el4_8
    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, 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, seamonkey-dom-inspector 1.0.9-51.el4_8 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, 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, seamonkey-dom-inspector 1.0.9-51.el4_8
    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

2.19% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

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.