From: Secunia Security Advisories (sec-advsecunia.com)
Date: Mon Apr 22 2013 - 17:00:05 CDT

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TITLE:
Xen Stub Domains IRQ Access Control Operations Handling Vulnerability

SECUNIA ADVISORY ID:
SA53137

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/53137/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=53137

RELEASE DATE:
2013-04-22

DISCUSS ADVISORY:
http://secunia.com/advisories/53137/#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/53137/

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=53137

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 vulnerability has been reported in Xen, which can be exploited by
malicious, local users in a guest virtual machine to bypass certain
security restrictions.

The vulnerability is caused due to an error within the handling of
IRQ access control operations, which can be exploited to gain access
to an otherwise restricted IRQ and e.g. cause a DoS.

Successful exploitation requires using a stub domain and using guests
with passed-through IRQs or PCI devices.

The vulnerability is reported in versions 4.1 and 4.2.

SOLUTION:
Apply patches.

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

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
XSA-46:
http://lists.xen.org/archives/html/xen-announce/2013-04/msg00003.html

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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Please Note:
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Secunia NEVER sends attached files with advisories.
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use those supplied by the vendor.

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