Xen VCPU denial of service
|xen-vcpu-dos (80022)||Medium Risk|
Xen is vulnerable to a denial of service, caused by an error when handling the VCPU deadline. A local attacker on a guest operating system could exploit this vulnerability to cause the system to enter into an infinite loop and crash.
Denial of Service
Refer to Xen Security Advisory 20 (CVE-2012-4535) for patch, upgrade or suggested workaround information. See References.
For other distributions:
Apply the appropriate update for your system. See References.
- CTX135458: Citrix XenServer Multiple Security Updates .
- Xen Security Advisory 20 (CVE-2012-4535): Timer overflow DoS vulnerability.
- BID-56498: Xen Multiple Denial of Service Vulnerabilities
- CVE-2012-4535: Xen 3.4 through 4.2, and possibly earlier versions, allows local guest OS administrators to cause a denial of service (Xen infinite loop and physical CPU consumption) by setting a VCPU with an inappropriate deadline.
- DSA-2582: xen -- several vulnerabilities
- RHSA-2012-1540: Important: kernel security, bug fix, and enhancement update
- SA51200: Xen Multiple Denial of Service Vulnerabilities
- SA51214: Citrix XenServer Multiple Denial of Service 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
Nov 13, 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.