National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2011-4622 Detail

Description

The create_pit_timer function in arch/x86/kvm/i8254.c in KVM 83, and possibly other versions, does not properly handle when Programmable Interval Timer (PIT) interrupt requests (IRQs) when a virtual interrupt controller (irqchip) is not available, which allows local users to cause a denial of service (NULL pointer dereference) by starting a timer.

Source:  MITRE      Last Modified:  01/27/2012

Quick Info

CVE Dictionary Entry:
CVE-2011-4622
Original release date:
01/27/2012
Last revised:
12/28/2017
Source:
US-CERT/NIST

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:
4.9 MEDIUM
Vector:
(AV:L/AC:L/Au:N/C:N/I:N/A:C) (legend)
Impact Subscore:
6.9
Exploitability Subscore:
3.9
CVSS Version 2 Metrics:
Access Vector:
Locally exploitable
Access Complexity:
Low
Authentication:
Not required to exploit
Impact Type:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html External Source SUSE SUSE-SU-2012:0616
http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html External Source SUSE openSUSE-SU-2013:0925
http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/83564 Patch External Source MLIST [kvm] 20111214 [PATCH 1/2] KVM: x86: Prevent starting PIT timers in the absence of irqchip support
http://www.openwall.com/lists/oss-security/2011/12/21/7 External Source MLIST [oss-security] 20111221 Re: kernel: kvm: pit timer with no irqchip crashes the system
http://www.redhat.com/support/errata/RHSA-2012-0051.html External Source REDHAT RHSA-2012:0051
http://www.securityfocus.com/bid/51172 External Source BID 51172
http://www.securitytracker.com/id?1026559 External Source SECTRACK 1026559
https://bugzilla.redhat.com/show_bug.cgi?id=769721 External Source CONFIRM https://bugzilla.redhat.com/show_bug.cgi?id=769721

Technical Details

Vulnerability Type (View All)

Vulnerable software and versions Switch to CPE 2.2

Configuration 1
OR
cpe:2.3:a:redhat:kvm:83:*:*:*:*:*:*:*

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History 2 change records found - show changes