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Fencer Vulns
medium 4.0

CVE-2006-4340 json

Mozilla Network Security Service (NSS) library before 3.11.3, as used in Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and Se…

published 2006-09-15 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-4328

cvss
4.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.3%
EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

Mozilla Network Security Service (NSS) library before 3.11.3, as used in Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and SeaMonkey before 1.0.5, when using an RSA key with exponent 3, does not properly handle extra data in a signature, which allows remote attackers to forge signatures for SSL/TLS and email certificates, a similar vulnerability to CVE-2006-4339. NOTE: on 20061107, Mozilla released an advisory stating that these versions were not completely patched by MFSA2006-60. The newer fixes for 1.5.0.7 are covered by CVE-2006-5462.

Patch / fix

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

debian advisories DEBIAN-CVE-2006-4340

  • thunderbird RHEL 4 1.5.0.7-0.1.el4
  • seamonkey RHEL 3 1.0.5-0.1.el3
  • seamonkey RHEL 4 1.0.5-0.1.el4
  • devhelp RHEL 4 0.10-0.4.el4
  • seamonkey-nss RHEL 3 1.0.5-0.1.el3
  • seamonkey-chat RHEL 3 1.0.5-0.1.el3
  • seamonkey-chat RHEL 4 1.0.5-0.1.el4
  • seamonkey-mail RHEL 3 1.0.5-0.1.el3

red hat advisories RHSA-2006:0677RHSA-2006:0676RHSA-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-2006-4340 updated

security flaw

  • Red Hat Desktop version 3 seamonkey 1.0.5-0.1.el3, seamonkey-nss 1.0.5-0.1.el3, seamonkey-chat 1.0.5-0.1.el3, seamonkey-mail 1.0.5-0.1.el3, seamonkey-nspr 1.0.5-0.1.el3, seamonkey-js-debugger 1.0.5-0.1.el3, +1 more Red Hat Enterprise Linux AS version 3 seamonkey 1.0.5-0.1.el3, seamonkey-nss 1.0.5-0.1.el3, seamonkey-chat 1.0.5-0.1.el3, seamonkey-mail 1.0.5-0.1.el3, seamonkey-nspr 1.0.5-0.1.el3, seamonkey-js-debugger 1.0.5-0.1.el3, +1 more Red Hat Enterprise Linux AS version 4 devhelp 0.10-0.4.el4, firefox 1.5.0.7-0.1.el4, seamonkey 1.0.5-0.1.el4, thunderbird 1.5.0.7-0.1.el4, seamonkey-chat 1.0.5-0.1.el4, seamonkey-mail 1.0.5-0.1.el4, +2 more Red Hat Enterprise Linux Desktop version 4 devhelp 0.10-0.4.el4, firefox 1.5.0.7-0.1.el4, seamonkey 1.0.5-0.1.el4, thunderbird 1.5.0.7-0.1.el4, seamonkey-chat 1.0.5-0.1.el4, seamonkey-mail 1.0.5-0.1.el4, +2 more Red Hat Enterprise Linux ES version 3 seamonkey 1.0.5-0.1.el3, seamonkey-nss 1.0.5-0.1.el3, seamonkey-chat 1.0.5-0.1.el3, seamonkey-mail 1.0.5-0.1.el3, seamonkey-nspr 1.0.5-0.1.el3, seamonkey-js-debugger 1.0.5-0.1.el3, +1 more Red Hat Enterprise Linux ES version 4 devhelp 0.10-0.4.el4, firefox 1.5.0.7-0.1.el4, seamonkey 1.0.5-0.1.el4, thunderbird 1.5.0.7-0.1.el4, seamonkey-chat 1.0.5-0.1.el4, seamonkey-mail 1.0.5-0.1.el4, +2 more
    +2 more products
    Red Hat Enterprise Linux WS version 3 seamonkey 1.0.5-0.1.el3, seamonkey-nss 1.0.5-0.1.el3, seamonkey-chat 1.0.5-0.1.el3, seamonkey-mail 1.0.5-0.1.el3, seamonkey-nspr 1.0.5-0.1.el3, seamonkey-js-debugger 1.0.5-0.1.el3, +1 more Red Hat Enterprise Linux WS version 4 devhelp 0.10-0.4.el4, firefox 1.5.0.7-0.1.el4, seamonkey 1.0.5-0.1.el4, thunderbird 1.5.0.7-0.1.el4, seamonkey-chat 1.0.5-0.1.el4, seamonkey-mail 1.0.5-0.1.el4, +2 more
    fixed: vendor fix RHSA-2006:0676

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

2.32% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 4.0 AV:N/AC:H/Au:N/C:P/I:P/A:N

Classification

Weakness
  • CWE-20 Improper Input Validation

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.