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TITLE:
Linux Kernel KVM Code Emulation CPL / IOPL Privilege Escalation
Vulnerabilities

SECUNIA ADVISORY ID:
SA38499

VERIFY ADVISORY:
http://secunia.com/advisories/38499/

DESCRIPTION:
Some vulnerabilities have been reported in the Linux Kernel, which
can be exploited by malicious, local users in a KVM guest to cause a
DoS (Denial of Service) and potentially gain escalated privileges.

The vulnerabilities are caused due to KVM's x86 code emulation
functionality not properly checking CPL and IOPL privileges, which
can be exploited to execute arbitrary code with escalated
privileges.

Successful exploitation may require an SMP guest.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Gleb Napatov, Red Hat

ORIGINAL ADVISORY:
RHSA-2010-0088:
https://rhn.redhat.com/errata/RHSA-2010-0088.html

Red Hat bug #560654:
https://bugzilla.redhat.com/show_bug.cgi?id=560654

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