Buffer overflow in hw/pt-msi.c in Xen 4.6.x and earlier, when using the qemu-xen-traditional (aka qemu-dm) device model, allows local x86 HVM guest administrators to gain privileges by leveraging a system with access to a passed-through MSI-X capable physical PCI device and MSI-X table entries, related to a "write path."
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html | |
| http://www.securitytracker.com/id/1034481 | vdb entry |
| http://xenbits.xen.org/xsa/advisory-164.html | vendor advisory |
| http://www.securityfocus.com/bid/79579 | vdb entry |
| https://security.gentoo.org/glsa/201604-03 | vendor advisory |
| http://support.citrix.com/article/CTX203879 | vendor advisory |