Xen pciback_enable_msi() denial of service
|xen-pcibackenablemsi-dos (81923)||Medium Risk|
Xen is vulnerable to a denial of service, caused by the failure to limit the rate of kernel log messages by the pciback_enable_msi() function. By flooding the system with kernel messages, a local attacker could exploit this vulnerability to render the system unusable.
Denial of Service
Refer to XSA-43 for patch, upgrade or suggested workaround information. See References.
For other distributions:
Apply the appropriate update for your system.
- CTX136540: Citrix XenServer Multiple Security Updates.
- CTX138633: Citrix XenClient XT Multiple Security Updates .
- XSA-43: Xen Security Advisory 43 (CVE-2013-0231) - Linux pciback DoS via not rate limited log messages..
- BID-57740: Xen Linux PCI Backend Drivers Local Denial of Service Vulnerability
- CVE-2013-0231: The pciback_enable_msi function in the PCI backend driver (drivers/xen/pciback/conf_space_capability_msi.c) in Xen for the Linux kernel 2.6.18 and 3.8 allows guest OS users with PCI device access to cause a denial of service via a large number of kernel log messages. NOTE: some of these details are obtained from third party information.
- DSA-2632: linux-2.6 -- privilege escalation/denial of service
- RHSA-2013-0747: Moderate: kernel security and bug fix update
- SA52059: Xen "pciback_enable_msi()" Log Message Flooding Denial of Service Vulnerability
- SA52188: Linux Kernel "pciback_enable_msi()" Log Message Flooding Denial of Service Vulnerability
- SA52353: Citrix XenServer Multiple Denial of Service Vulnerabilities
- SA54625: Citrix XenClient XT Multiple Vulnerabilities
- Citrix XenClient 2.1.2
- Citrix XenClient 3.1.3
- Citrix XenServer 5.0
- Citrix XenServer 5.5
- Citrix XenServer 5.6
- Citrix XenServer 6.0
- Citrix XenServer 6.1
- Linux Kernel 2.6.18
- Linux Kernel 3.7
- RedHat Enterprise Linux 5 Client
- RedHat Enterprise Linux 5
- XenSource Xen 3.0
- XenSource Xen 3.1
- XenSource Xen 3.2
Feb 05, 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.