[SA21446] XFree86 PCF Integer Overflow Vulnerabilities

TITLE:
XFree86 PCF Integer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA21446

VERIFY ADVISORY:
http://secunia.com/advisories/21446/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
XFree86 4.5.x
http://secunia.com/product/4870/
XFree86 4.4.x
http://secunia.com/product/3510/
XFree86 4.3.x
http://secunia.com/product/1131/
XFree86 4.2.x
http://secunia.com/product/3011/
XFree86 4.1.x
http://secunia.com/product/3012/
XFree86 4.6.x
http://secunia.com/product/11386/

DESCRIPTION:
A vulnerability has been reported in XFree86, which can be exploited
by malicious people to cause a DoS (Denial of Service) and
potentially compromise a vulnerable system.

The vulnerability is caused due to integer overflows in the PCF font
parser and can be exploited to crash the X server and potentially
execute arbitrary code.

This is related to:
SA20100

SOLUTION:
Do not parse untrusted PCF font files.

OTHER REFERENCES:
SA20100:
http://secunia.com/advisories/20100/

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/

Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.