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Fencer Vulns
critical 9.3

CVE-2008-0420 json

modules/libpr0n/decoders/bmp/nsBMPDecoder.cpp in Mozilla Firefox before 2.0.0.12, Thunderbird before 2.0.0.12, and SeaMonkey before 1.1.8 d…

published 2008-02-12 18 y ago modified 2026-06-16 4 mo ago also EUVD-2008-0430

cvss
9.3
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

modules/libpr0n/decoders/bmp/nsBMPDecoder.cpp in Mozilla Firefox before 2.0.0.12, Thunderbird before 2.0.0.12, and SeaMonkey before 1.1.8 does not properly perform certain calculations related to the mColors table, which allows remote attackers to read portions of memory uninitialized via a crafted 8-bit bitmap (BMP) file that triggers an out-of-bounds read within the heap, as demonstrated using a CANVAS element; or cause a denial of service (application crash) via a crafted 8-bit bitmap file that triggers an out-of-bounds read. NOTE: the initial public reports stated that this affected Firefox in Ubuntu 6.06 through 7.10.

Patch / fix

  • thunderbird RHEL 4 1.5.0.12-8.el4
  • thunderbird RHEL 5 PRODUCTIVITY, RHEL 5 1.5.0.12-8.el5
  • seamonkey RHEL 2.1 1.0.9-0.9.el2
  • seamonkey RHEL 3 1.0.9-0.9.el3
  • seamonkey RHEL 4 1.0.9-9.el4
  • seamonkey-nss RHEL 2.1 1.0.9-0.9.el2
  • seamonkey-nss RHEL 3 1.0.9-0.9.el3
  • seamonkey-chat RHEL 2.1 1.0.9-0.9.el2

red hat advisories RHSA-2008:0105RHSA-2008:0104RHSA-2008:0103

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-2008-0420 updated

Mozilla information disclosure flaw

  • Red Hat Desktop version 3 seamonkey 1.0.9-0.9.el3, seamonkey-nss 1.0.9-0.9.el3, seamonkey-chat 1.0.9-0.9.el3, seamonkey-mail 1.0.9-0.9.el3, seamonkey-nspr 1.0.9-0.9.el3, seamonkey-js-debugger 1.0.9-0.9.el3, +1 more
    fixed: vendor fix RHSA-2008:0104
  • Red Hat Enterprise Linux (v. 5 server) firefox 1.5.0.12-9.el5
    fixed: vendor fix RHSA-2008:0103
  • Red Hat Enterprise Linux AS (Advanced Server) version 2.1 seamonkey 1.0.9-0.9.el2, seamonkey-nss 1.0.9-0.9.el2, seamonkey-chat 1.0.9-0.9.el2, seamonkey-mail 1.0.9-0.9.el2, seamonkey-nspr 1.0.9-0.9.el2, seamonkey-js-debugger 1.0.9-0.9.el2, +1 more Red Hat Enterprise Linux AS version 3 seamonkey 1.0.9-0.9.el3, seamonkey-nss 1.0.9-0.9.el3, seamonkey-chat 1.0.9-0.9.el3, seamonkey-mail 1.0.9-0.9.el3, seamonkey-nspr 1.0.9-0.9.el3, seamonkey-js-debugger 1.0.9-0.9.el3, +1 more Red Hat Enterprise Linux AS version 4 seamonkey 1.0.9-9.el4, firefox 1.5.0.12-0.10.el4, seamonkey-chat 1.0.9-9.el4, seamonkey-mail 1.0.9-9.el4, thunderbird 1.5.0.12-8.el4, seamonkey-js-debugger 1.0.9-9.el4, +1 more
    fixed: vendor fix RHSA-2008:0104
  • Red Hat Enterprise Linux Desktop (v. 5 client) firefox 1.5.0.12-9.el5, thunderbird 1.5.0.12-8.el5
    fixed: vendor fix RHSA-2008:0103
  • Red Hat Enterprise Linux Desktop version 4 seamonkey 1.0.9-9.el4, firefox 1.5.0.12-0.10.el4, seamonkey-chat 1.0.9-9.el4, seamonkey-mail 1.0.9-9.el4, thunderbird 1.5.0.12-8.el4, seamonkey-js-debugger 1.0.9-9.el4, +1 more Red Hat Enterprise Linux ES version 2.1 seamonkey 1.0.9-0.9.el2, seamonkey-nss 1.0.9-0.9.el2, seamonkey-chat 1.0.9-0.9.el2, seamonkey-mail 1.0.9-0.9.el2, seamonkey-nspr 1.0.9-0.9.el2, seamonkey-js-debugger 1.0.9-0.9.el2, +1 more Red Hat Enterprise Linux ES version 3 seamonkey 1.0.9-0.9.el3, seamonkey-nss 1.0.9-0.9.el3, seamonkey-chat 1.0.9-0.9.el3, seamonkey-mail 1.0.9-0.9.el3, seamonkey-nspr 1.0.9-0.9.el3, seamonkey-js-debugger 1.0.9-0.9.el3, +1 more Red Hat Enterprise Linux ES version 4 seamonkey 1.0.9-9.el4, firefox 1.5.0.12-0.10.el4, seamonkey-chat 1.0.9-9.el4, seamonkey-mail 1.0.9-9.el4, thunderbird 1.5.0.12-8.el4, seamonkey-js-debugger 1.0.9-9.el4, +1 more
    fixed: vendor fix RHSA-2008:0104
  • Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird 1.5.0.12-8.el5
    fixed: vendor fix RHSA-2008:0105
  • Red Hat Enterprise Linux WS version 2.1 seamonkey 1.0.9-0.9.el2, seamonkey-nss 1.0.9-0.9.el2, seamonkey-chat 1.0.9-0.9.el2, seamonkey-mail 1.0.9-0.9.el2, seamonkey-nspr 1.0.9-0.9.el2, seamonkey-js-debugger 1.0.9-0.9.el2, +1 more Red Hat Enterprise Linux WS version 3 seamonkey 1.0.9-0.9.el3, seamonkey-nss 1.0.9-0.9.el3, seamonkey-chat 1.0.9-0.9.el3, seamonkey-mail 1.0.9-0.9.el3, seamonkey-nspr 1.0.9-0.9.el3, seamonkey-js-debugger 1.0.9-0.9.el3, +1 more Red Hat Enterprise Linux WS version 4 seamonkey 1.0.9-9.el4, firefox 1.5.0.12-0.10.el4, seamonkey-chat 1.0.9-9.el4, seamonkey-mail 1.0.9-9.el4, thunderbird 1.5.0.12-8.el4, seamonkey-js-debugger 1.0.9-9.el4, +1 more Red Hat Linux Advanced Workstation 2.1 seamonkey 1.0.9-0.9.el2, seamonkey-nss 1.0.9-0.9.el2, seamonkey-chat 1.0.9-0.9.el2, seamonkey-mail 1.0.9-0.9.el2, seamonkey-nspr 1.0.9-0.9.el2, seamonkey-js-debugger 1.0.9-0.9.el2, +1 more
    fixed: vendor fix RHSA-2008:0104

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

2.22% 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 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

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.