Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update.
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.debian.org/security/2016/dsa-3663 | vendor advisory |
| http://www.securityfocus.com/bid/92864 | third party advisory vdb entry |
| http://xenbits.xen.org/xsa/advisory-187.html | patch vendor advisory |
| http://support.citrix.com/article/CTX216071 | third party advisory |
| http://www.securitytracker.com/id/1036753 | third party advisory vdb entry |
| https://security.gentoo.org/glsa/201611-09 | vendor advisory |
| http://xenbits.xen.org/xsa/xsa187-0001-x86-shadow-Avoid-overflowing-sh_ctxt-seg_reg.patch | patch vendor advisory |