Linux Kernel 2.6.23 do_setlk race condition

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel 2.6.23. Affected by this vulnerability is the function do_setlk. This manipulation causes race condition. The identification of this vulnerability is CVE-2008-4307. Furthermore, there is an exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel 2.6.23 (Operating System) and classified as problematic. Affected by this vulnerability is the function do_setlk. 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 do_setlk function in fs/nfs/file.c in the Linux kernel before 2.6.26 allows local users to cause a denial of service (crash) via vectors resulting in an interrupted RPC call that leads to a stray FL_POSIX lock, related to improper handling of a race between fcntl and close in the EINTR case.

The bug was discovered 01/13/2009. The weakness was shared 01/13/2009 as Bug 456282 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2008-4307 since 09/29/2008. The exploitation appears to be difficult. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

A public exploit has been developed in ANSI C. It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 462 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 67854 (Oracle Linux 5 : kernel (ELSA-2009-0473)), 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 155908 (Oracle Enterprise Linux Update for Kernel (ELSA-2009-0473)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 5 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (47923), Tenable (67854), SecurityFocus (BID 33113†), OSVDB (53312†) and Secunia (SA34917†). The entries VDB-45802, VDB-45623, VDB-47847 and VDB-47846 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.1
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 67854
Nessus Name: Oracle Linux 5 : kernel (ELSA-2009-0473)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 63939
OpenVAS Name: Debian Security Advisory DSA 1787-1 (linux-2.6.24)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

10/09/2007 🔍
09/29/2008 +356 days 🔍
01/05/2009 +98 days 🔍
01/13/2009 +8 days 🔍
01/13/2009 +0 days 🔍
01/13/2009 +0 days 🔍
01/13/2009 +0 days 🔍
02/26/2009 +44 days 🔍
04/29/2009 +62 days 🔍
05/08/2009 +9 days 🔍
07/12/2013 +1526 days 🔍
03/17/2015 +613 days 🔍
08/28/2019 +1625 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 456282
Status: Not defined
Confirmation: 🔍

CVE: CVE-2008-4307 (🔍)
GCVE (CVE): GCVE-0-2008-4307
GCVE (VulDB): GCVE-100-45859

OVAL: 🔍

X-Force: 47923
SecurityFocus: 33113 - Linux Kernel 'FWD-TSN' Chunk Remote Buffer Overflow Vulnerability
Secunia: 34917 - Red Hat update for kernel-rt, Not Critical
OSVDB: 53312 - CVE-2008-4307 - Linux - Kernel - Denial-Of-Service Issue
Vulnerability Center: 21073 - Linux Kernel Prior to 2.6.26 Local DoS Vulnerability in Race Condition in do_setlk Function, Low
Vupen: ADV-2009-3316

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/17/2015 16:11
Updated: 08/28/2019 12:36
Changes: 03/17/2015 16:11 (85), 08/28/2019 12:36 (10)
Complete: 🔍
Cache ID: 216::103

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