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Fencer Vulns
medium 6.8

CVE-2006-6505 json

Multiple heap-based buffer overflows in Mozilla Thunderbird before 1.5.0.9 and SeaMonkey before 1.0.7 allow remote attackers to execute arb…

published 2006-12-20 19 y ago modified 2026-06-16 4 mo ago also EUVD-2006-6488

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.3%
EPSS 4.3% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

Multiple heap-based buffer overflows in Mozilla Thunderbird before 1.5.0.9 and SeaMonkey before 1.0.7 allow remote attackers to execute arbitrary code via (1) external message modies with long Content-Type headers or (2) long RFC2047-encoded (MIME non-ASCII) headers.

Patch / fix

  • thunderbird RHEL 4 1.5.0.9-0.1.el4
  • seamonkey RHEL 2.1 1.0.7-0.1.el2
  • seamonkey RHEL 3 1.0.7-0.1.el3
  • seamonkey RHEL 4 1.0.7-0.1.el4
  • devhelp RHEL 4 0.10-0.6.el4
  • seamonkey-nss RHEL 2.1 1.0.7-0.1.el2
  • seamonkey-nss RHEL 3 1.0.7-0.1.el3
  • seamonkey-chat RHEL 2.1 1.0.7-0.1.el2

red hat advisories RHSA-2006:0760RHSA-2006:0759

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-2006-6505 updated

seamonkey < 1.0.7 multiple vulnerabilities

  • Red Hat Desktop version 3 seamonkey 1.0.7-0.1.el3, seamonkey-nss 1.0.7-0.1.el3, seamonkey-chat 1.0.7-0.1.el3, seamonkey-mail 1.0.7-0.1.el3, seamonkey-nspr 1.0.7-0.1.el3, seamonkey-js-debugger 1.0.7-0.1.el3, +1 more Red Hat Enterprise Linux AS (Advanced Server) version 2.1 seamonkey 1.0.7-0.1.el2, seamonkey-nss 1.0.7-0.1.el2, seamonkey-chat 1.0.7-0.1.el2, seamonkey-mail 1.0.7-0.1.el2, seamonkey-nspr 1.0.7-0.1.el2, seamonkey-js-debugger 1.0.7-0.1.el2, +1 more Red Hat Enterprise Linux AS version 3 seamonkey 1.0.7-0.1.el3, seamonkey-nss 1.0.7-0.1.el3, seamonkey-chat 1.0.7-0.1.el3, seamonkey-mail 1.0.7-0.1.el3, seamonkey-nspr 1.0.7-0.1.el3, seamonkey-js-debugger 1.0.7-0.1.el3, +1 more Red Hat Enterprise Linux AS version 4 devhelp 0.10-0.6.el4, seamonkey 1.0.7-0.1.el4, thunderbird 1.5.0.9-0.1.el4, seamonkey-chat 1.0.7-0.1.el4, seamonkey-mail 1.0.7-0.1.el4, seamonkey-js-debugger 1.0.7-0.1.el4, +1 more Red Hat Enterprise Linux Desktop version 4 devhelp 0.10-0.6.el4, seamonkey 1.0.7-0.1.el4, thunderbird 1.5.0.9-0.1.el4, seamonkey-chat 1.0.7-0.1.el4, seamonkey-mail 1.0.7-0.1.el4, seamonkey-js-debugger 1.0.7-0.1.el4, +1 more Red Hat Enterprise Linux ES version 2.1 seamonkey 1.0.7-0.1.el2, seamonkey-nss 1.0.7-0.1.el2, seamonkey-chat 1.0.7-0.1.el2, seamonkey-mail 1.0.7-0.1.el2, seamonkey-nspr 1.0.7-0.1.el2, seamonkey-js-debugger 1.0.7-0.1.el2, +1 more
    +6 more products
    Red Hat Enterprise Linux ES version 3 seamonkey 1.0.7-0.1.el3, seamonkey-nss 1.0.7-0.1.el3, seamonkey-chat 1.0.7-0.1.el3, seamonkey-mail 1.0.7-0.1.el3, seamonkey-nspr 1.0.7-0.1.el3, seamonkey-js-debugger 1.0.7-0.1.el3, +1 more Red Hat Enterprise Linux ES version 4 devhelp 0.10-0.6.el4, seamonkey 1.0.7-0.1.el4, thunderbird 1.5.0.9-0.1.el4, seamonkey-chat 1.0.7-0.1.el4, seamonkey-mail 1.0.7-0.1.el4, seamonkey-js-debugger 1.0.7-0.1.el4, +1 more Red Hat Enterprise Linux WS version 2.1 seamonkey 1.0.7-0.1.el2, seamonkey-nss 1.0.7-0.1.el2, seamonkey-chat 1.0.7-0.1.el2, seamonkey-mail 1.0.7-0.1.el2, seamonkey-nspr 1.0.7-0.1.el2, seamonkey-js-debugger 1.0.7-0.1.el2, +1 more Red Hat Enterprise Linux WS version 3 seamonkey 1.0.7-0.1.el3, seamonkey-nss 1.0.7-0.1.el3, seamonkey-chat 1.0.7-0.1.el3, seamonkey-mail 1.0.7-0.1.el3, seamonkey-nspr 1.0.7-0.1.el3, seamonkey-js-debugger 1.0.7-0.1.el3, +1 more Red Hat Enterprise Linux WS version 4 devhelp 0.10-0.6.el4, seamonkey 1.0.7-0.1.el4, thunderbird 1.5.0.9-0.1.el4, seamonkey-chat 1.0.7-0.1.el4, seamonkey-mail 1.0.7-0.1.el4, seamonkey-js-debugger 1.0.7-0.1.el4, +1 more Red Hat Linux Advanced Workstation 2.1 seamonkey 1.0.7-0.1.el2, seamonkey-nss 1.0.7-0.1.el2, seamonkey-chat 1.0.7-0.1.el2, seamonkey-mail 1.0.7-0.1.el2, seamonkey-nspr 1.0.7-0.1.el2, seamonkey-js-debugger 1.0.7-0.1.el2, +1 more
    fixed: vendor fix RHSA-2006:0759

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

4.35% chance of exploitation in the next 30 days, higher than 91% 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.