Secunia Security Advisory - A weakness 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).
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TITLE:
Xen DMA Requests IOMMU Denial of Service Weakness
SECUNIA ADVISORY ID:
SA46105
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/46105/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=46105
RELEASE DATE:
2011-09-23
DISCUSS ADVISORY:
http://secunia.com/advisories/46105/#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/46105/
ONLY AVAILABLE IN CUSTOMER AREA:
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* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=46105
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 weakness 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 weakness is caused due to Xen not properly restricting bogus DMA
requests to PCI/PCIE devices under direct control by the virtual
machine, which can be exploited to cause IOMMU faults and a high CPU
load or deadlock.
For more information:
SA45622
SOLUTION:
Fixed in the Mercurial repository.
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/
ORIGINAL ADVISORY:
http://lists.xensource.com/archives/html/xen-devel/2011-08/msg00450.html
http://xenbits.xen.org/hg/staging/xen-4.1-testing.hg/rev/84e3706df07a
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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