Linux Kernel 2.6.33 CLONE_IO io_context input validation

CVSS Meta Temp Score
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5.6$0-$5k0.00

A vulnerability was found in Linux Kernel 2.6.33 (Operating System). It has been declared as problematic. Affected by this vulnerability is the function io_context of the component CLONE_IO. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

The I/O implementation for block devices in the Linux kernel before 2.6.33 does not properly handle the CLONE_IO feature, which allows local users to cause a denial of service (I/O instability) by starting multiple processes that share an I/O context.

The issue has been introduced in 02/24/2010. The weakness was shared 12/04/2009 as confirmed mailinglist post (oss-sec). The advisory is shared at seclists.org. This vulnerability is known as CVE-2012-0879 since 01/19/2012. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 68515 (Oracle Linux 6 : kernel (ELSA-2012-0481)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156319 (Oracle Enterprise Linux Update for Kernel Security, Bug Fix and Enhancement Update (ELSA-2012-0481)).

Upgrading to version 2.6.33 rc1 eliminates this vulnerability. The upgrade is hosted for download at bugzilla.redhat.com. A possible mitigation has been published 3 years after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (73424) and Tenable (68515). Additional details are provided at comments.gmane.org. The entries 4672 and 4958 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
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NVD Base Score: 5.5
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CVSSv2info

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Exploitinginfo

Class: Input validation
CWE: CWE-20
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Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Nessus ID: 68515
Nessus Name: Oracle Linux 6 : kernel (ELSA-2012-0481)
Nessus File: 🔍
Nessus Risk: 🔍
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Nessus Context: 🔍
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OpenVAS ID: 892469
OpenVAS Name: Debian Security Advisory DSA 2469-1 (linux-2.6 - privilege escalation/denial of service
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Qualys ID: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
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Upgrade: Kernel 2.6.33 rc1

Timelineinfo

12/04/2009 🔍
02/24/2010 +82 days 🔍
01/19/2012 +694 days 🔍
02/23/2012 +35 days 🔍
02/24/2012 +1 days 🔍
02/29/2012 +5 days 🔍
03/07/2012 +7 days 🔍
03/27/2012 +20 days 🔍
05/15/2012 +49 days 🔍
05/17/2012 +2 days 🔍
05/22/2012 +5 days 🔍
07/12/2013 +416 days 🔍
03/21/2021 +2809 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: seclists.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-0879 (🔍)
OVAL: 🔍

X-Force: 73424
SecurityTracker: 1027086 - Linux Kernel CLONE_IO Bug Lets Local Users Deny Service
Vulnerability Center: 35066 - Linux Kernel 2.6.0-2.6.32.7 \x27clone()\x27 System Call Multiple Local DoS Vulnerabilities, Medium
SecurityFocus: 52152 - Linux Kernel 'Clone()' Function 'CLONE_IO' Flag Multiple Denial Of Service Vulnerabilities
Secunia: 48287 - Ubuntu update for kernel, Less Critical
OSVDB: 79614

Misc.: 🔍
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Entryinfo

Created: 02/29/2012 01:00
Updated: 03/21/2021 07:46
Changes: 02/29/2012 01:00 (82), 04/11/2017 22:12 (12), 03/21/2021 07:44 (13), 03/21/2021 07:46 (1)
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