CVE-2005-0399

CVE-2005-0399 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 5.1. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

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.

Frequently asked questions

What is CVE-2005-0399?
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.
How severe is CVE-2005-0399?
CVE-2005-0399 has a CVSS 2.0 base score of 5.1, rated medium severity.
Is CVE-2005-0399 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-0399?
CVE-2005-0399 primarily affects Mozilla Firefox. In total, 46 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-0399?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-0399 published?
CVE-2005-0399 was published on 2005-05-02 and last updated on 2026-06-16.

References

Affected products (46)

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