Xen 4.6.x and earlier does not properly enforce limits on page order inputs for the (1) XENMEM_increase_reservation, (2) XENMEM_populate_physmap, (3) XENMEM_exchange, and possibly other HYPERVISOR_memory_op suboperations, which allows ARM guest OS administrators to cause a denial of service (CPU consumption, guest reboot, or watchdog timeout and host reboot) and possibly have unspecified other impact via unknown vectors.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Xen | Xen | * | 4.6.0 (including) |
| Xen | Ubuntu | devel | * |
| Xen | Ubuntu | trusty | * |
| Xen | Ubuntu | upstream | * |
| Xen | Ubuntu | vivid | * |
| Xen | Ubuntu | wily | * |
References
- http://www.debian.org/security/2016/dsa-3633
- http://www.securityfocus.com/bid/78920
- http://www.securitytracker.com/id/1034390
- http://xenbits.xen.org/xsa/advisory-158.html
- http://www.debian.org/security/2016/dsa-3633
- http://www.securityfocus.com/bid/78920
- http://www.securitytracker.com/id/1034390
- http://xenbits.xen.org/xsa/advisory-158.html