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CVE-2005-0399

20
FAUCET Score

CVE-2005-0399 describes a heap-based buffer overflow vulnerability in the GIF image rendering component (GIF2.cpp) affecting Firefox before 1.0.2, Mozilla before 1.7.6, and Thunderbird before 1.0.2. This flaw allows remote attackers to execute arbitrary code by enticing a user to open a specially crafted GIF image containing a malicious Netscape extension 2 block. The vulnerability has a CVSS score of 5.1, indicating a medium severity with network-based attacks requiring high attack complexity, potentially leading to partial confidentiality, integrity, and availability compromise. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
0.8CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.8:*:*:*:*:*:*:*
0.9CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9:*:*:*:*:*:*:*
0.9CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9:rc:*:*:*:*:*:*
0.9.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9.1:*:*:*:*:*:*:*
0.9.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.9.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.1MEDIUM

AV:N/AC:H/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
15.12%
Probability of exploitation in next 30 days
EPSS Percentile
96.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1512 is in the 97th percentile among its peer group of 19,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: devhelp-0:0.9.2-2.4.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: evolution-0:2.0.2-14
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:1.0.2-1.4.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: thunderbird-0:1.0.2-1.4.1
View patch
mozillavendor investigatingvia nvd_reference
View patch
redhatvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2005-0399Critical

security flaw

Mar 23, 2005

References

ftp.sco.com / pub/updates/OpenServer/SCOSA-2005.49/SCOSA-2005.49.txt
bugzilla.redhat.com / bugzilla/show_bug.cgi
Vendor Advisory
secunia.com / advisories/14654
PatchVendor Advisory
secunia.com / advisories/19823
exchange.xforce.ibmcloud.com / vulnerabilities/19269
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100028
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11377
ciac.org / ciac/bulletins/p-160.shtml
gentoo.org / security/en/glsa/glsa-200503-30.xml
Vendor Advisory
kb.cert.org / vuls/id/557948
Third Party AdvisoryUS Government Resource
mozilla.org / security/announce/mfsa2005-30.html
Vendor Advisory
novell.com / linux/security/advisories/2006_04_25.html
redhat.com / support/errata/RHSA-2005-323.html
Vendor Advisory
redhat.com / support/errata/RHSA-2005-335.html
Vendor Advisory
redhat.com / support/errata/RHSA-2005-336.html
Vendor Advisory
redhat.com / support/errata/RHSA-2005-337.html
Vendor Advisory
securityfocus.com / bid/12881
securityfocus.com / bid/15495
vupen.com / english/advisories/2005/0296
xforce.iss.net / xforce/alerts/id/191
Vendor Advisory