Linux Kernel 2.6.16.9 de_thread race condition

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

A vulnerability classified as problematic was found in Linux Kernel 2.6.16.9 (Operating System). Affected by this vulnerability is the function de_thread. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect availability. The summary by CVE is:

Race condition in the __exit_signal function in kernel/exit.c in the Linux kernel before 2.6.37-rc2 allows local users to cause a denial of service via vectors related to multithreaded exec, the use of a thread group leader in kernel/posix-cpu-timers.c, and the selection of a new thread group leader in the de_thread function in fs/exec.c.

The issue has been introduced in 03/20/2006. The weakness was disclosed 11/30/2010 as Bug 656264 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2010-4248 since 11/16/2010. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1716 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 51426 (CentOS 5 : kernel (CESA-2011:0004)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 155552 (Oracle Enterprise Linux Update for Kernel Security, Bug Fix, and Enhancement Update (ELSA-2011-0004)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (51426). The entries 55571, 56004, 56003 and 55923 are pretty similar.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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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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Exploitinginfo

Class: Race condition
CWE: CWE-362
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 51426
Nessus Name: CentOS 5 : kernel (CESA-2011:0004)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 68992
OpenVAS Name: Debian Security Advisory DSA 2153-1 (linux-2.6)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: e0a70217107e6f9844628120412cb27bb4cea194

Timelineinfo

03/20/2006 🔍
11/16/2010 +1702 days 🔍
11/23/2010 +7 days 🔍
11/23/2010 +0 days 🔍
11/30/2010 +7 days 🔍
11/30/2010 +0 days 🔍
12/13/2010 +13 days 🔍
01/05/2011 +23 days 🔍
03/19/2015 +1534 days 🔍
10/05/2021 +2392 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 656264
Status: Not defined
Confirmation: 🔍

CVE: CVE-2010-4248 (🔍)
OVAL: 🔍
IAVM: 🔍

Vulnerability Center: 28619 - Linux Kernel Prior to 2.6.37-rc2 __exit_signal Function Local DoS Vulnerability, Low
SecurityFocus: 45028 - Linux Kernel 'posix-cpu-timers.c' Local Race Condition Vulnerability
Secunia: 42789 - Red Hat update for kernel, Moderately Critical
Vupen: ADV-2011-0024

See also: 🔍

Entryinfo

Created: 03/19/2015 14:37
Updated: 10/05/2021 23:26
Changes: 03/19/2015 14:37 (66), 03/11/2017 08:44 (16), 10/05/2021 23:12 (4), 10/05/2021 23:26 (1)
Complete: 🔍

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