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Last updated: 5/27/2016 1:57:51 PM

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Vulnerability Summary for CVE-2010-0309

Original release date: 02/12/2010
Last revised: 08/21/2010


The pit_ioport_read function in the Programmable Interval Timer (PIT) emulation in i8254.c in KVM 83 does not properly use the pit_state data structure, which allows guest OS users to cause a denial of service (host OS crash or hang) by attempting to read the /dev/port file.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 6.8 MEDIUM
Impact Subscore: 6.9
Exploitability Subscore: 8.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Required to exploit
Impact Type: Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: UBUNTU
Name: USN-914-1
External Source: MLIST
Name: [oss-security] 20100202 Re: CVE request - kvm: cat /dev/port in the guest can cause host DoS
External Source: MLIST
Name: [oss-security] 20100202 CVE request - kvm: cat /dev/port in the guest can cause host DoS
External Source: VUPEN
Name: ADV-2010-0638
External Source: MLIST
Name: [kvm] 20100129 KVM: PIT: control word is write-only
External Source: BID
Name: 38158
External Source: REDHAT
Name: RHSA-2010:0088
Type: Advisory
External Source: REDHAT
Name: RHSA-2010:0095
Type: Advisory; Patch Information
External Source: OVAL
Name: oval:org.mitre.oval:def:11095
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=560887
External Source: DEBIAN
Name: DSA-1996

References to Check Content

Identifier: oval:org.mitre.oval:def:11095
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

Vulnerable software and versions

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