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TITLE:
AMD Catalyst Proprietary Display Driver (Linux) xauth Cookie
Disclosure Security Issue

SECUNIA ADVISORY ID:
SA45260

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/45260/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=45260

RELEASE DATE:
2011-07-27

DISCUSS ADVISORY:
http://secunia.com/advisories/45260/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/45260/

ONLY AVAILABLE IN CUSTOMER AREA:
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 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
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 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=45260

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A security issue has been reported in the AMD Catalyst Proprietary
Display Driver (Linux), which can be exploited by malicious, local
users to disclose sensitive information.

The security issue is caused due to the authatieventsd.sh script
generating the X authority file by passing the X authority cookie via
the command line to "xauth". This can be exploited to disclose the X
authority cookie by consulting the process list and e.g. gain access
the user's display.

The security issue is reported in version 11.6 (8.861). Other
versions may also be affected.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Vincent Zweije

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=625868

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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

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