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


Secure your corporate defenses and reduce complexity in handling vulnerability threats with the new Secunia Vulnerability Intelligence Manager (VIM).

Request a free trial: 
http://secunia.com/products/corporate/vim/


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

TITLE:
Xen Backend Drivers Kernel Thread Leak Denial of Service
Vulnerabilities

SECUNIA ADVISORY ID:
SA42372

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/42372/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=42372

RELEASE DATE:
2010-11-24

DISCUSS ADVISORY:
http://secunia.com/advisories/42372/#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/42372/

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=42372

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:
Some vulnerabilities have been reported in Xen, which can be
exploited by malicious, local users to cause a DoS (Denial of
Service).

The vulnerabilities are caused due to the backend drivers leaking
references to kernel threads, which can be exploited out of a guest
virtual machine to e.g. prevent a proper virtual machine shutdown and
stop the "xm" commands from working correctly.

SOLUTION:
Fixed in the Mercurial repository.

PROVIDED AND/OR DISCOVERED BY:
Disclosed in a Mercurial commit.

ORIGINAL ADVISORY:
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/59f097ef181b

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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

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.

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