CVE-2004-0083XFree86 Vulnerability
Buffer overflow in ReadFontAlias from dirfile.c of XFree86 4.1.0 through 4.3.0 allows local users and remote attackers to execute arbitrary code via a font alias file (font.alias) with a long token, a different vulnerability than CVE-2004-0084 and CVE-2004-0106.
Published Feb 8, 2004 · Updated Mar 9, 2026
Key Facts
Patch immediately- CVE-2004-0083 is a critical-severity vulnerability (CVSS 10.0 v2) affecting X11r6 (Xfree86 Project), Openbsd, XFree86 (debian).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 21% probability of exploitation in the next 30 days.
- Fixed versions are available, including XFree86 4.1.0-16woody3, XFree86 0:4.3.0-55.EL.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
10.0
AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
21%
Higher than 97.5% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
43/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
- advisoryRHSA-2004:059
- advisoryRHSA-2004:060
- advisoryRHSA-2004:061
- advisoryGLSA-200402-02
- advisoryhttp://www.xfree86.org/cvs/changes
- patch9636
Description
Buffer overflow in ReadFontAlias from dirfile.c of XFree86 4.1.0 through 4.3.0 allows local users and remote attackers to execute arbitrary code via a font alias file (font.alias) with a long token, a different vulnerability than CVE-2004-0084 and CVE-2004-0106.
Affected Products
11 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| X11r6Xfree86 Project | 4.1.0, 4.1.11, 4.1.12, 4.2.0, 4.2.1, 4.3.0 | n/a |
| OpenbsdOpenbsd | 3.3, 3.4 | n/a |
| XFree86debian | See advisory | 4.1.0-16woody3 |
Patched Releases
XFree86
4.1.0-16woody3, 0:4.3.0-55.EL
Timeline
Publicly disclosed
Feb 8, 2004
Last updated
Mar 9, 2026
References
- advisoryRHSA-2004:059
- advisoryRHSA-2004:060
- advisoryRHSA-2004:061
- advisoryGLSA-200402-02
- advisoryxfree86.org · changes
FAQ
Common Questions.
Buffer overflow in ReadFontAlias from dirfile.c of XFree86 4.1.0 through 4.3.0 allows local users and remote attackers to execute arbitrary code via a font alias file (font.alias) with a long token, a different vulnerability than CVE-2004-0084 and CVE-2004-0106.
Affected: X11r6 (Xfree86 Project) versions 4.1.0, 4.1.11, 4.1.12, 4.2.0, 4.2.1, 4.3.0; Openbsd versions 3.3, 3.4; XFree86 (debian). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including XFree86 4.1.0-16woody3, XFree86 0:4.3.0-55.EL.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2004-0083 On Your Attack Surface?
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