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TITLE:
systemd X11 Session File Creation Weakness

SECUNIA ADVISORY ID:
SA48208

VERIFY ADVISORY:
Secunia.com
https://secunia.com/advisories/48208/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=48208

RELEASE DATE:
2012-03-02

DISCUSS ADVISORY:
https://secunia.com/advisories/48208/#comments

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

https://secunia.com/advisories/48208/

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=48208

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

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

DESCRIPTION:
A weakness has been reported in systemd, which can be exploited by
malicious, local users to potentially gain escalated privileges.

The weakness is caused due to the systemd-logind component insecurely
creating a X11 session file (/run/user/<username>/X11/display) and can
be exploited to create a symlink inside arbitrary directories.

The weakness is reported in versions prior to 39.

SOLUTION:
Update to version 39 or later.

PROVIDED AND/OR DISCOVERED BY:
Sebastian Krahmer, SUSE Security Team

ORIGINAL ADVISORY:
https://bugzilla.novell.com/show_bug.cgi?id=747154

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

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

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

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

EXPLOIT:
Further details available in Customer Area:
https://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.

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

Definitions: (Criticality, Where etc.)
https://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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