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Secunia Security Advisory 49789

Secunia Security Advisory 49789
Posted Jul 29, 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 | 1733ffd39953d0e02c18eb2702ac9400

Secunia Security Advisory 49789

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TITLE:
Xen HVM Guest MMIO Emulation Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA49789

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/49789/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=49789

RELEASE DATE:
2012-07-27

DISCUSS ADVISORY:
http://secunia.com/advisories/49789/#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/49789/

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=49789

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 certain data of MMIO operations
not being handled properly after emulation cycles in HVM guests and
can be exploited to crash subsequent emulations.

Successful exploitation requires that the guests are not PV
(para-virtualised).

The vulnerability is reported in all supported versions.

SOLUTION:
Apply patch xsa10-4.x.patch.

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

ORIGINAL ADVISORY:
http://www.openwall.com/lists/oss-security/2012/07/26/4

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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