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Fencer Vulns
medium 5.0

CVE-2006-3804 json

Heap-based buffer overflow in Mozilla Thunderbird before 1.5.0.5 and SeaMonkey before 1.0.3 allows remote attackers to cause a denial of se…

published 2006-07-27 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-3798

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

Heap-based buffer overflow in Mozilla Thunderbird before 1.5.0.5 and SeaMonkey before 1.0.3 allows remote attackers to cause a denial of service (crash) via a VCard attachment with a malformed base64 field, which copies more data than expected due to an integer underflow.

Patch / fix

  • thunderbird Debian 14, Debian 13, Debian 12 1.5.0.5-1

debian advisories DEBIAN-CVE-2006-3804

  • thunderbird RHEL 4 1.5.0.5-0.el4.1
  • seamonkey RHEL 4 1.0.3-0.el4.1
  • devhelp RHEL 4 0.10-0.2.el4
  • seamonkey-chat RHEL 4 1.0.3-0.el4.1
  • seamonkey-mail RHEL 4 1.0.3-0.el4.1
  • seamonkey-js-debugger RHEL 4 1.0.3-0.el4.1
  • seamonkey-dom-inspector RHEL 4 1.0.3-0.el4.1
  • seamonkey RHEL 3 1.0.3-0.el3.1

red hat advisories RHSA-2006:0611RHSA-2006:0609RHSA-2006:0608

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-2006-3804 updated

security flaw

  • Red Hat Desktop version 3 seamonkey 1.0.3-0.el3.1, seamonkey-nss 1.0.3-0.el3.1, seamonkey-chat 1.0.3-0.el3.1, seamonkey-mail 1.0.3-0.el3.1, seamonkey-nspr 1.0.3-0.el3.1, seamonkey-js-debugger 1.0.3-0.el3.1, +1 more Red Hat Enterprise Linux AS version 3 seamonkey 1.0.3-0.el3.1, seamonkey-nss 1.0.3-0.el3.1, seamonkey-chat 1.0.3-0.el3.1, seamonkey-mail 1.0.3-0.el3.1, seamonkey-nspr 1.0.3-0.el3.1, seamonkey-js-debugger 1.0.3-0.el3.1, +1 more
    fixed: vendor fix RHSA-2006:0608
  • Red Hat Enterprise Linux AS version 4 devhelp 0.10-0.2.el4, seamonkey 1.0.3-0.el4.1, thunderbird 1.5.0.5-0.el4.1, seamonkey-chat 1.0.3-0.el4.1, seamonkey-mail 1.0.3-0.el4.1, seamonkey-js-debugger 1.0.3-0.el4.1, +1 more Red Hat Enterprise Linux Desktop version 4 devhelp 0.10-0.2.el4, seamonkey 1.0.3-0.el4.1, thunderbird 1.5.0.5-0.el4.1, seamonkey-chat 1.0.3-0.el4.1, seamonkey-mail 1.0.3-0.el4.1, seamonkey-js-debugger 1.0.3-0.el4.1, +1 more
    fixed: vendor fix RHSA-2006:0609
  • Red Hat Enterprise Linux ES version 2.1
    fixed: vendor fix RHSA-2006:0594
  • Red Hat Enterprise Linux ES version 3 seamonkey 1.0.3-0.el3.1, seamonkey-nss 1.0.3-0.el3.1, seamonkey-chat 1.0.3-0.el3.1, seamonkey-mail 1.0.3-0.el3.1, seamonkey-nspr 1.0.3-0.el3.1, seamonkey-js-debugger 1.0.3-0.el3.1, +1 more
    fixed: vendor fix RHSA-2006:0608
  • Red Hat Enterprise Linux ES version 4 devhelp 0.10-0.2.el4, seamonkey 1.0.3-0.el4.1, thunderbird 1.5.0.5-0.el4.1, seamonkey-chat 1.0.3-0.el4.1, seamonkey-mail 1.0.3-0.el4.1, seamonkey-js-debugger 1.0.3-0.el4.1, +1 more
    fixed: vendor fix RHSA-2006:0609
  • Red Hat Enterprise Linux WS version 2.1
    fixed: vendor fix RHSA-2006:0594
  • Red Hat Enterprise Linux WS version 3 seamonkey 1.0.3-0.el3.1, seamonkey-nss 1.0.3-0.el3.1, seamonkey-chat 1.0.3-0.el3.1, seamonkey-mail 1.0.3-0.el3.1, seamonkey-nspr 1.0.3-0.el3.1, seamonkey-js-debugger 1.0.3-0.el3.1, +1 more
    fixed: vendor fix RHSA-2006:0608
  • Red Hat Enterprise Linux WS version 4 devhelp 0.10-0.2.el4, seamonkey 1.0.3-0.el4.1, thunderbird 1.5.0.5-0.el4.1, seamonkey-chat 1.0.3-0.el4.1, seamonkey-mail 1.0.3-0.el4.1, seamonkey-js-debugger 1.0.3-0.el4.1, +1 more
    fixed: vendor fix RHSA-2006:0609
show 1 more
  • Red Hat Linux Advanced Workstation 2.1
    fixed: vendor fix RHSA-2006:0594

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

3.31% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/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.