CVE-2004-0084XFree86 Vulnerability
Buffer overflow in the ReadFontAlias function in XFree86 4.1.0 to 4.3.0, when using the CopyISOLatin1Lowered function, allows local or remote authenticated users to execute arbitrary code via a malformed entry in the font alias (font.alias) file, a different vulnerability than…
Published Feb 12, 2004 · Updated Mar 9, 2026
Key Facts
Patch immediately- CVE-2004-0084 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 25% 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)
25%
Higher than 97.8% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
41/100
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
- patchRHSA-2004:060
- patchRHSA-2004:061
- patch9652
Description
Buffer overflow in the ReadFontAlias function in XFree86 4.1.0 to 4.3.0, when using the CopyISOLatin1Lowered function, allows local or remote authenticated users to execute arbitrary code via a malformed entry in the font alias (font.alias) file, a different vulnerability than CVE-2004-0083 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 12, 2004
Last updated
Mar 9, 2026
References
- advisoryRHSA-2004:059
- advisoryRHSA-2004:060
- advisoryRHSA-2004:061
- patchRHSA-2004:060
- patchRHSA-2004:061
FAQ
Common Questions.
Buffer overflow in the ReadFontAlias function in XFree86 4.1.0 to 4.3.0, when using the CopyISOLatin1Lowered function, allows local or remote authenticated users to execute arbitrary code via a malformed entry in the font alias (font.alias) file, a different vulnerability than CVE-2004-0083 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-2004-0084 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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