Secunia Security Advisory - Some vulnerabilities have been reported in XFree86, which can be exploited by malicious, local users to gain escalated privileges.
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TITLE:
XFree86 CID Encoded Fonts Integer Overflows
SECUNIA ADVISORY ID:
SA21890
VERIFY ADVISORY:
http://secunia.com/advisories/21890/
CRITICAL:
Less critical
IMPACT:
Privilege escalation
WHERE:
Local system
SOFTWARE:
XFree86 4.1.x
http://secunia.com/product/3012/
XFree86 4.2.x
http://secunia.com/product/3011/
XFree86 4.3.x
http://secunia.com/product/1131/
XFree86 4.4.x
http://secunia.com/product/3510/
XFree86 4.5.x
http://secunia.com/product/4870/
XFree86 4.6.x
http://secunia.com/product/11386/
DESCRIPTION:
Some vulnerabilities have been reported in XFree86, which can be
exploited by malicious, local users to gain escalated privileges.
Integer overflows exist within the "scan_cidfont()" function when
handling CMap and CIDFont data, and the "CIDAFM()" function when
parsing AFM (Adobe Font Metric) files. These can potentially be
exploited to execute arbitrary code via specially crafted CID encoded
Type1 fonts.
Successful exploitation may allow to execute arbitrary code with
escalated privileges.
SOLUTION:
Do not load the "type1" font module.
PROVIDED AND/OR DISCOVERED BY:
Discovered by an anonymous person and reported via iDEFENSE.
ORIGINAL ADVISORY:
iDEFENSE:
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=411
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=412
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About:
This Advisory was delivered by Secunia as a free service to help
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