[ GLSA 200705-10 ] LibXfont, TightVNC: Multiple vulnerabilities

[GLSA]

Gentoo Linux Security Advisory

Title: LibXfont, TightVNC: Multiple vulnerabilities (GLSA 200705-10)
Severity: high
Exploitable: local
Date: May 08, 2007
Bug(s): #172575, #174200
ID: 200705-10

Synopsis

Multiple vulnerabilities have been reported in libXfont and TightVNC, allowing for the execution of arbitrary code with root privileges.

Background

LibXfont is the X.Org font library. TightVNC is a VNC client/server for X displays.

Affected Packages

Package: net-misc/tightvnc
Vulnerable: < 1.2.9-r4
Unaffected: >= 1.2.9-r4
Architectures: All supported architectures

Package: x11-libs/libXfont
Vulnerable: < 1.2.7-r1
Unaffected: >= 1.2.7-r1
Architectures: All supported architectures


Description

The libXfont code is prone to several integer overflows, in functions ProcXCMiscGetXIDList(), bdfReadCharacters() and FontFileInitTable(). TightVNC contains a local copy of this code and is also affected.

Impact

A local attacker could use a specially crafted BDF Font to gain root privileges on the vulnerable host.

Workaround

There is no known workaround at this time.

Resolution

All libXfont users should upgrade to the latest version: