Xen AMD IOMMU denial of service

xen-amdiommu-dos (81831) The risk level is classified as MediumMedium Risk

Description:

Xen is vulnerable to a denial of service, caused by an error in the Xen AMD IOMMU feature when handling interrupt remap entries. If there is a guest with a passed through PCI device that is bus mastering, a local attacker could exploit this vulnerability to cause the application to crash.

*CVSS:

Base Score: 1.9
  Access Vector: Local
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 1.4
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Refer to XSA-36 for patch, upgrade or suggested workaround information. See References.

For other distributions:
Apply the appropriate update for your system.

References:

  • CTX136540: Citrix XenServer Multiple Security Updates.
  • XSA-36: interrupt remap entries shared and old ones not cleared on AMD IOMMUs.
  • BID-57745: Xen AMD IOMMU CVE-2013-0153 Local Denial of Service Vulnerability
  • CVE-2013-0153: The AMD IOMMU support in Xen 4.2.x, 4.1.x, 3.3, and other versions, when using AMD-Vi for PCI passthrough, uses the same interrupt remapping table for the host and all guests, which allows guests to cause a denial of service by injecting an interrupt into other guests.
  • DSA-2636: xen -- several vulnerabilities
  • RHSA-2013-0847: Moderate: kernel security and bug fix update
  • SA51881: Xen Interrupt Remap Handling Denial of Service Vulnerability
  • SA52353: Citrix XenServer Multiple Denial of Service Vulnerabilities

Platforms Affected:

  • Citrix XenServer 5.0
  • Citrix XenServer 5.5
  • Citrix XenServer 5.6
  • Citrix XenServer 6.0
  • Citrix XenServer 6.1
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 5
  • XenSource Xen 3.0
  • XenSource Xen 4.1
  • XenSource Xen 4.1.1
  • XenSource Xen 4.1.2

Reported:

Feb 05, 2013

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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