Vulnerability CVE-2010-0306
Published: 2010-02-12   Modified: 2012-02-13

Description:
The x86 emulator in KVM 83, when a guest is configured for Symmetric Multiprocessing (SMP), does not use the Current Privilege Level (CPL) and I/O Privilege Level (IOPL) to restrict instruction execution, which allows guest OS users to cause a denial of service (guest OS crash) or gain privileges on the guest OS by leveraging access to a (1) IO port or (2) MMIO region, and replacing an instruction in between emulator entry and instruction fetch, a related issue to CVE-2010-0298.

Type:

CWE-264

 (Permissions, Privileges, and Access Controls)

CVSS2 => (AV:L/AC:M/Au:S/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.1/10
6.4/10
2.7/10
Exploit range
Attack complexity
Authentication
Local
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Kvm qumranet -> KVM 

 References:
https://rhn.redhat.com/errata/RHSA-2010-0095.html
https://rhn.redhat.com/errata/RHSA-2010-0088.html
https://bugzilla.redhat.com/show_bug.cgi?id=560654
http://www.securityfocus.com/bid/38158
http://www.debian.org/security/2010/dsa-1996
http://secunia.com/advisories/38499
http://secunia.com/advisories/38492
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:10953
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