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Secunia Security Advisory 50191

Secunia Security Advisory 50191
Posted Aug 13, 2012
Authored by Secunia | Site secunia.com

Secunia Security Advisory - A vulnerability has been reported in Xen, which can be exploited by malicious, local users in a guest virtual machine to cause a DoS (Denial of Service).

tags | advisory, denial of service, local
MD5 | dbad3801dc50fc657baf8b53b2a8ae54

Secunia Security Advisory 50191

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TITLE:
Xen HVM Guest p2m Teardown Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA50191

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/50191/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=50191

RELEASE DATE:
2012-08-10

DISCUSS ADVISORY:
http://secunia.com/advisories/50191/#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/50191/

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=50191

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 cause a DoS
(Denial of Service).

The vulnerability is caused due to an error when handling physical
address space when tearing down p2m mappings and can be exploited to
block the domain 0 VCPU and trigger a kernel panic.

NOTE: This issue does not affect PV (para-virtualised) guests.

The vulnerability is reported in versions 4.0 and 4.1.

SOLUTION:
Apply patch xsa11-4.1.patch or xsa11-4.0.patch.

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

ORIGINAL ADVISORY:
http://lists.xen.org/archives/html/xen-devel/2012-08/msg00855.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/

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

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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