Xen 4.4.x, when running on an ARM system and "handling an unknown system register access from 64-bit userspace," returns to an instruction of the trap handler for kernel space faults instead of an instruction that is associated with faults in 64-bit userspace, which allows local guest users to cause a denial of service (crash) and possibly gain privileges via a crafted process.
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://secunia.com/advisories/59934 | third party advisory |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/95233 | vdb entry |
| http://xenbits.xenproject.org/xsa/advisory-103.html | patch vendor advisory |
| http://www.securitytracker.com/id/1030725 | vdb entry |
| http://www.securityfocus.com/bid/69189 | vdb entry |