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XFree86 Multiple Integer Overflow Vulnerabilities
Secunia Advisory: SA9651
Release Date: 2003-09-02
Last Update: 2003-09-12
Popularity: 10,920 views

Critical:
Less critical
Impact: Privilege escalation
System access
Where: From local network
Solution Status: Vendor Patch

Software:XFree86 4.3.x

Secunia CVSS-2 Score: Available in Secunia business solutions

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Advisory Content (Page 1 of 3)[ 1 ] [ 2 ] [ 3 ]

Description:
Multiple vulnerabilities have been reported in XFree86, which potentially can be exploited by malicious users to escalate their privileges on a vulnerable system or compromise it.

The vulnerabilities are caused due to integer overflows in the XFree86 font libraries. Reportedly, the problem is more specifically in the functions handling the transfer and enumeration of fonts from font servers to clients. Since various input isn't checked sufficiently, it is possible to cause a miscalculation of the required buffer sizes, which may lead to buffer overflows.

A malicious user can exploit this to escalate privileges on a vulnerable system by specifying a malicious font server. A malicious person may potentially also be able to compromise a vulnerable system if either xfs or XServer is running in a non-default configuration acting as a client to a font server.

The vulnerabilities have been reported in version 4.3.0.

Change Page:
[ 1 ] [ 2 ] [ 3 ]



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