Xen extent_order denial of service
|xen-extentorder-dos (80479)||Medium Risk|
Xen is vulnerable to a denial of service, caused by an error when handling extent_order values for XENMEM_decrease_reservation, XENMEM_populate_physmap, and XENMEM_exchange. An attacker could exploit this vulnerability using unknown attack vectors to cause the application to hang.
Denial of Service
Refer to Xen Security Advisory 31 for patch, upgrade or suggested workaround information. See References.
For other distributions:
Apply the appropriate update for your system. See References.
- CTX135777: Citrix XenServer Multiple Security Updates.
- Xen Security Advisory 31: Several memory hypercall operations allow invalid extent order values.
- BID-56798: Xen 'extent_order' Values Multiple Local Denial of Service Vulnerabilities
- CVE-2012-5515: The (1) XENMEM_decrease_reservation, (2) XENMEM_populate_physmap, and (3) XENMEM_exchange hypercalls in Xen 4.2 and earlier allow local guest administrators to cause a denial of service (long loop and hang) via a crafted extent_order value.
- DSA-2582: xen -- several vulnerabilities
- OSVDB ID: 88127: Xen Multiple Memory Hypercall Operation extent_order Value Handling Local DoS
- RHSA-2013-0168: Moderate: kernel security and bug fix update
- SA51397: Xen Multiple Vulnerabilities
- SA51486: Citrix XenServer Multiple Vulnerabilities
- 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
Dec 03, 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.