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TITLE:
KVM "kvm_arch_vcpu_ioctl_set_sregs()" Denial of Service

SECUNIA ADVISORY ID:
SA35675

VERIFY ADVISORY:
http://secunia.com/advisories/35675/

DESCRIPTION:
A vulnerability has been reported in KVM, which can be exploited by
malicious, local users to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the
"kvm_arch_vcpu_ioctl_set_sregs()"  function. This can be exploited to
trigger a NULL-pointer dereference and potentially crash an affected
system by setting the CR3 register to an invalid value via a
specially crafted "KVM_SET_SREGS" call.

The vulnerability is reported in version kvm-84. Other versions may
also be affected.

SOLUTION:
Restrict local access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Matt T. Yourst

ORIGINAL ADVISORY:
http://sourceforge.net/tracker/?func=detail&atid=893831&aid=2687641&group_id=180599

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