Xen hypercall denial of service

xen-hypercall-dos (80977) The risk level is classified as MediumMedium Risk

Description:

Xen is vulnerable to a denial of service. A local attacker on the PV guest operating system could exploit this vulnerability using a hypercall to cause the target host hypervisor to crash.

*CVSS:

Base Score: 2.1
  Access Vector: Local
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 1.6
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Apply the patch for this vulnerability (xsa37-4.2.patch), available from the XenSource Web site. See References.

References:

  • oss-sec mailing list, Fri, 04 Jan 2013 16:01:03 +0000: Xen Security Advisory 37 (CVE-2013-0154) - Hypervisor crash due to incorrect ASSERT (debug build only).
  • XenSource Web site: Xen.
  • xsa37-4.2.patch: x86: fix assertion in get_page_type().
  • BID-57159: Xen CVE-2013-0154 Local Denial Of Service Vulnerability
  • CVE-2013-0154: The get_page_type function in xen/arch/x86/mm.c in Xen 4.2, when debugging is enabled, allows local PV or HVM guest administrators to cause a denial of service (assertion failure and hypervisor crash) via unspecified vectors related to a hypercall.

Platforms Affected:

  • XenSource Xen 4.2

Reported:

Jan 04, 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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