Xen IRQ setup code execution
|xen-irq-cve20141642-code-exec (90649)||Medium Risk|
Xen could allow a local attacker to execute arbitrary code on the system, caused by a use-after-free error when setting up the IRQ. If a system with a 64-bit hypervisor is configured to support more than 128 CPUs or a 32-bit hypervisor is configured to support more than 64 CPUs, a local attacker could exploit this vulnerability to corrupt memory and execute arbitrary code on the system with elevated privileges.
Refer to XSA-83 for patch, upgrade or suggested workaround information. See References.
- XSA-83: Xen Security Advisory 83 (CVE-2014-1642) - Out-of-memory condition yielding memory corruption during IRQ setup.
- BID-65097: Xen Use After Free Memory Corruption Vulnerability
- CVE-2014-1642: The IRQ setup in Xen 4.2.x and 4.3.x, when using device passthrough and configured to support a large number of CPUs, frees certain memory that may still be intended for use, which allows local guest administrators to cause a denial of service (memory corruption and hypervisor crash) and possibly execute arbitrary code via vectors related to an out-of-memory error that triggers a (1) use-after-free or (2) double free.
- SA56557: Xen "pirq_guest_bind()" IRQ Setup Double Free Vulnerability
- XenSource Xen 4.2
Jan 23, 2014
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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.