Xen XENMEM_populate_physmap denial of service
|xen-xenmempopulatephysmap-dos (78267)||Medium Risk|
Xen is vulnerable to a denial of service, caused by an error in the XENMEM_populate_physmap macro when handling specific flags. By invoking the macro with MEMF_populate_on_demand flag set, a local attacker on a guest operating system could exploit this vulnerability to cause the host operating system to crash.
Denial of Service
Refer to Xen Security Advisory 14 (CVE-2012-3496) for patch, upgrade or suggested workaround information. See References.
For other distributions:
Apply the appropriate update for your system. See References.
- CTX134708: Citrix XenServer Multiple Security Updates.
- CTX134876: Citrix NetScaler SDX Multiple Security Updates .
- Red Hat Bugzilla Bug 854590: CVE-2012-3496 kernel: xen: XENMEM_populate_physmap DoS vulnerability [fedora-all].
- Xen Security Advisory 14 (CVE-2012-3496): XENMEM_populate_physmap DoS vulnerability.
- BID-55412: Xen 'XENMEM_populate_physmap' CVE-2012-3496 Denial of Service Vulnerability
- CVE-2012-3496: XENMEM_populate_physmap in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when translating paging mode is not used, allows local PV OS guest kernels to cause a denial of service (BUG triggered and host crash) via invalid flags such as MEMF_populate_on_demand.
- DSA-2544: xen -- denial of service
- OSVDB ID: 85200: Xen XENMEM_populate_physmap Macro MEMF_populate_on_demand Flag Handling Local DoS
- SA50472: Xen Multiple Denial of Service and Privilege Escalation Vulnerabilities
- SA50530: Citrix XenServer Denial of Service and Privilege Escalation Vulnerabilities
- 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
- XenSource Xen 4.1.1
- XenSource Xen 4.1.2
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.