Xen PHYSDEVOP_map_pirq denial of service

xen-physdevopmappirq-dos (78269) The risk level is classified as MediumMedium Risk

Description:

Xen is vulnerable to a denial of service, caused by an array indexing error in PHYSDEVOP_map_pirq. A local attacker on a HVM guest operating system could exploit this vulnerability to cause the host operating system 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:

Refer to Xen Security Advisory 16 (CVE-2012-3498) for patch, upgrade or suggested workaround information. See References.

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

References:

  • CTX134708: Citrix XenServer Multiple Security Updates.
  • CTX134876: Citrix NetScaler SDX Multiple Security Updates .
  • Red Hat Bugzilla Bug 851193: CVE-2012-3498 kernel: xen: PHYSDEVOP_map_pirq index vulnerability.
  • Xen Security Advisory 16 (CVE-2012-3498): PHYSDEVOP_map_pirq index vulnerability.
  • BID-55414: Xen 'PHYSDEVOP_map_pirq' Index CVE-2012-3498 Denial of Service Vulnerability
  • CVE-2012-3498: PHYSDEVOP_map_pirq in Xen 4.1 and 4.2 and Citrix XenServer 6.0.2 and earlier allows local HVM guest OS kernels to cause a denial of service (host crash) and possibly read hypervisor or guest memory via vectors related to a missing range check of map->index.
  • OSVDB ID: 85198: Xen PHYSDEVOP_map_pirq Array Indexing Local DoS
  • SA50472: Xen Multiple Denial of Service and Privilege Escalation Vulnerabilities
  • SA50530: Citrix XenServer Denial of Service and Privilege Escalation Vulnerabilities

Platforms Affected:

  • Citrix NetScaler SDX 10.x
  • Citrix NetScaler SDX 9.x
  • Citrix XenServer 5.0
  • Citrix XenServer 5.5
  • Citrix XenServer 5.6
  • Citrix XenServer 6.0
  • XenSource Xen 4.1

Reported:

Sep 05, 2012

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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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