VDB-4488 · CVE-2011-4622 · BID 51172

Linux Kernel arch/x86/kvm/i8254.c create_pit_timer denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

A vulnerability was found in Linux Kernel (Operating System) (affected version unknown). It has been classified as problematic. Affected is the function create_pit_timer of the file arch/x86/kvm/i8254.c. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

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.

The weakness was presented 12/14/2011 (Website). The advisory is shared for download at permalink.gmane.org. This vulnerability is traded as CVE-2011-4622 since 11/29/2011. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 68434 (Oracle Linux 5 : kvm (ELSA-2012-0051)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350692 (Amazon Linux Security Advisory for kernel: ALAS-2012-055).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at permalink.gmane.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (68434). See 4434, 4553, 4536 and 4523 for similar entries.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Denial of service
CWE: CWE-404
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Nessus ID: 68434
Nessus Name: Oracle Linux 5 : kvm (ELSA-2012-0051)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892389
OpenVAS Name: Debian Security Advisory DSA 2389-1 (linux-2.6 - privilege escalation/denial of service/information leak
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Patch: permalink.gmane.org

Timelineinfo

12/24/2010 🔍
02/22/2011 +60 days 🔍
11/29/2011 +280 days 🔍
12/14/2011 +15 days 🔍
12/14/2011 +0 days 🔍
12/22/2011 +8 days 🔍
12/22/2011 +0 days 🔍
01/21/2012 +29 days 🔍
01/23/2012 +2 days 🔍
01/27/2012 +4 days 🔍
07/12/2013 +532 days 🔍
03/20/2021 +2808 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: permalink.gmane.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-4622 (🔍)
OVAL: 🔍
IAVM: 🔍

SecurityTracker: 1026559 - KVM PIT IRQ Bug Lets Local Users Deny Service
Vulnerability Center: 29893 - IBM Tivoli Access Manager for e-business 6.1.1 Remote Information Disclosure Vulnerability, Medium
SecurityFocus: 51172 - Linux Kernel KVM 'create_pit_timer()' Function Local Denial of Service Vulnerability
Secunia: 47293 - Linux Kernel KVM PIT Denial of Service Vulnerability, Not Critical
OSVDB: 77985

See also: 🔍

Entryinfo

Created: 01/21/2012 01:00
Updated: 03/20/2021 09:19
Changes: 01/21/2012 01:00 (77), 03/16/2017 15:31 (11), 03/20/2021 09:19 (3)
Complete: 🔍

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