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Fencer Vulns
medium 5.1

CVE-2005-0399 json

Heap-based buffer overflow in GIF2.cpp in Firefox before 1.0.2, Mozilla before to 1.7.6, and Thunderbird before 1.0.2, and possibly other a…

published 2005-03-24 21 y ago modified 2026-06-16 4 mo ago also EUVD-2005-0400

cvss
5.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
15.1%
EPSS 15.1% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

Heap-based buffer overflow in GIF2.cpp in Firefox before 1.0.2, Mozilla before to 1.7.6, and Thunderbird before 1.0.2, and possibly other applications that use the same library, allows remote attackers to execute arbitrary code via a GIF image with a crafted Netscape extension 2 block and buffer size.

Patch / fix

  • thunderbird RHEL 4 1.0.2-1.4.1
  • firefox RHEL 4 1.0.2-1.4.1
  • devhelp RHEL 4 0.9.2-2.4.3
  • evolution RHEL 4 2.0.2-14

red hat advisories RHSA-2005:337RHSA-2005:336RHSA-2005:335

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-2005-0399 updated

security flaw

  • Red Hat Enterprise Linux AS version 4 evolution 2.0.2-14, devhelp 0.9.2-2.4.3, firefox 1.0.2-1.4.1, thunderbird 1.0.2-1.4.1 Red Hat Enterprise Linux Desktop version 4 evolution 2.0.2-14, devhelp 0.9.2-2.4.3, firefox 1.0.2-1.4.1, thunderbird 1.0.2-1.4.1 Red Hat Enterprise Linux ES version 4 evolution 2.0.2-14, devhelp 0.9.2-2.4.3, firefox 1.0.2-1.4.1, thunderbird 1.0.2-1.4.1 Red Hat Enterprise Linux WS version 4 evolution 2.0.2-14, devhelp 0.9.2-2.4.3, firefox 1.0.2-1.4.1, thunderbird 1.0.2-1.4.1
    fixed: vendor fix RHSA-2005:335

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

15.12% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 5.1 AV:N/AC:H/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.