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Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200609-07] LibXfont, monolithic X.org: Multiple integer overflows


Vulnerability Assessment Details

[GLSA-200609-07] LibXfont, monolithic X.org: Multiple integer overflows

Vulnerability Assessment Summary
LibXfont, monolithic X.org: Multiple integer overflows

Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200609-07
(LibXfont, monolithic X.org: Multiple integer overflows)


Several integer overflows have been found in the CID font parser.

Impact

A remote attacker could exploit this vulnerability by enticing a user
to load a malicious font file resulting in the execution of arbitrary
code with the permissions of the user running the X server which
typically is the root user. A local user could exploit this
vulnerability to gain elevated rights.

Workaround

Disable CID-encoded Type 1 fonts by removing the "type1" module and
replacing it with the "freetype" module in xorg.conf.

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=2006-3739
http://cve.mitre.org/cgi-bin/cvename.cgi?name=2006-3740


Solution:
All libXfont users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.2.1"
All monolithic X.org users are advised to migrate to modular X.org.


Network Security Threat Level: High


Networks Security ID:

Vulnerability Assessment Copyright: (C) 2006 Michel Arboi

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