Security Advisory SA10824 - XFree86 "font.alias" File Parsing Privilege Escalation Vulnerabilities

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Secunia Advisory SA10824

XFree86 "font.alias" File Parsing Privilege Escalation Vulnerabilities

Secunia Advisory

SA10824

Release Date

2004-02-11

Last Update

2004-12-08

Popularity

12,963 views

Comments

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Criticality level

Less critical

Impact

Privilege escalation

Where

Local system

Authentication level

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Report reliability

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Solution Status

Vendor Patch

Systems affected

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Approve distribution

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Software:

XFree86 4.1.x

XFree86 4.2.x

XFree86 4.x

Secunia CVSS Score

This information is available to Secunia VIM Customers

CVE Reference(s)

CVE-2004-0083 CVSS score available to Secunia VIM customers
CVE-2004-0084 CVSS score available to Secunia VIM customers
CVE-2004-0106 CVSS score available to Secunia VIM customers

Description

iDEFENSE has discovered some vulnerabilities in XFree86, which can be exploited by malicious, local users to gain escalated privileges.

The vulnerabilities are caused due to boundary errors in the "ReadFontAlias()" and "CopyISOLatin1Lowered()" functions when parsing a "font.alias" file. This can be exploited to cause a buffer overflow by constructing a malicious "font.alias" file.

Successful exploitation allows execution of arbitrary code with root privileges.

The vulnerabilities have been reported in versions 4.1.0 through 4.3.0. Prior versions may also be affected.

Solution
Apply patch or update to version 4.3.99.903 Release Candidate.
Further details available to Secunia VIM customers

Provided and/or discovered by
Greg MacManus, iDEFENSE Labs.

Changelog
Further details available to Secunia VIM customers

Original Advisory
http://www.idefense.com/application/poi/display?id=72&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=73&type=vulnerabilities

Other references
Further details available to Secunia VIM customers

Deep Links
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Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: XFree86 "font.alias" File Parsing Privilege Escalation Vulnerabilities

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Secunia Advisory SA10824

XFree86 "font.alias" File Parsing Privilege Escalation Vulnerabilities

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