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Fencer Vulns
low 2.6

CVE-2006-4567 json

Mozilla Firefox before 1.5.0.7 and Thunderbird before 1.5.0.7 makes it easy for users to accept self-signed certificates for the auto-updat…

published 2006-09-15 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-4555

cvss
2.6
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

Mozilla Firefox before 1.5.0.7 and Thunderbird before 1.5.0.7 makes it easy for users to accept self-signed certificates for the auto-update mechanism, which might allow remote user-assisted attackers to use DNS spoofing to trick users into visiting a malicious site and accepting a malicious certificate for the Mozilla update site, which can then be used to install arbitrary code on the next update.

Patch / fix

  • thunderbird Debian 14, Debian 13, Debian 12 1.5.0.7-1

debian advisories DEBIAN-CVE-2006-4567

  • thunderbird RHEL 4 1.5.0.7-0.1.el4
  • firefox RHEL 4 1.5.0.7-0.1.el4

red hat advisories RHSA-2006:0677RHSA-2006:0675

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-2006-4567 updated

security flaw

  • Red Hat Enterprise Linux AS version 4 firefox 1.5.0.7-0.1.el4, thunderbird 1.5.0.7-0.1.el4 Red Hat Enterprise Linux Desktop version 4 firefox 1.5.0.7-0.1.el4, thunderbird 1.5.0.7-0.1.el4 Red Hat Enterprise Linux ES version 4 firefox 1.5.0.7-0.1.el4, thunderbird 1.5.0.7-0.1.el4 Red Hat Enterprise Linux WS version 4 firefox 1.5.0.7-0.1.el4, thunderbird 1.5.0.7-0.1.el4
    fixed: vendor fix RHSA-2006:0675

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

1.94% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • mozilla.org http://www.mozilla.org/security/announce/2006/mfsa2006-58.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 2.6 AV:N/AC:H/Au:N/C:N/I:P/A:N

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.