exploit the possibilities

Secunia Security Advisory 47566

Secunia Security Advisory 47566
Posted Jan 19, 2012
Authored by Secunia | Site secunia.com

Secunia Security Advisory - Gu1 has discovered a weakness in X.Org, which can be exploited by malicious people with physical access to bypass certain security restrictions.

tags | advisory
MD5 | 78ac4dd7d46049ed9aab1a6a5caf8a80

Secunia Security Advisory 47566

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TITLE:
X.Org Grab-Breaking Keybinding Security Bypass Weakness

SECUNIA ADVISORY ID:
SA47566

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/47566/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47566

RELEASE DATE:
2012-01-19

DISCUSS ADVISORY:
http://secunia.com/advisories/47566/#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/47566/

ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=47566

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:
Gu1 has discovered a weakness in X.Org, which can be exploited by
malicious people with physical access to bypass certain security
restrictions.

The weakness is caused due to xserver providing a grab-breaking
hotkey functionality, which is bound by default in xkeyboard-config.
This can be exploited to e.g. bypass the lock mechanism provided by
certain screen savers by pressing a certain key combination.

SOLUTION:
Do not rely on the screen locking mechanism provided by screen
savers.

PROVIDED AND/OR DISCOVERED BY:
Gu1

ORIGINAL ADVISORY:
http://gu1.aeroxteam.fr/2012/01/19/bypass-screensaver-locker-program-xorg-111-and-up/

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/

----------------------------------------------------------------------

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.

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

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

----------------------------------------------------------------------

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