Linux Kernel 2.6.16 Netfilter Calculation race condition

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel 2.6.16. Affected by this vulnerability is an unknown functionality of the component Netfilter. The manipulation of the argument Calculation as part of SCTP Chunk leads to race condition. This vulnerability is referenced as CVE-2006-0039. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel 2.6.16 (Operating System) and classified as critical. This issue affects an unknown functionality of the component Netfilter. The manipulation of the argument Calculation as part of a SCTP Chunk leads to a race condition vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

Race condition in the do_add_counters function in netfilter for Linux kernel 2.6.16 allows local users with CAP_NET_ADMIN capabilities to read kernel memory by triggering the race condition in a way that produces a size value that is inconsistent with allocated memory, which leads to a buffer over-read in IPT_ENTRY_ITERATE.

The issue has been introduced in 03/20/2006. The weakness was published 05/22/2006 by Solar Designer with Linux Kernel Team (Website). It is possible to read the advisory at kernel.org. The identification of this vulnerability is CVE-2006-0039 since 12/20/2005. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 60 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 27886 (Ubuntu 5.04 / 5.10 / 6.06 LTS : linux-source-2.6.10/-2.6.12/-2.6.15 vulnerabilities (USN-311-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156246 (Oracle Enterprise Linux Update for Kernel (ELSA-2006:0617, ELSA-2006:0689)).

Upgrading to version 2.4.33 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at kernel.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (26583), Tenable (27886), SecurityFocus (BID 18113†), OSVDB (25696†) and Secunia (SA20185†). Similar entries are available at VDB-2256, VDB-2254, VDB-2257 and VDB-2379. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 27886
Nessus Name: Ubuntu 5.04 / 5.10 / 6.06 LTS : linux-source-2.6.10/-2.6.12/-2.6.15 vulnerabilities (USN-311-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 56956
OpenVAS Name: Debian Security Advisory DSA 1097-1 (kernel-source-2.4.27)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kernel 2.4.33
Patch: kernel.org

Timelineinfo

12/20/2005 🔍
03/20/2006 +90 days 🔍
05/19/2006 +60 days 🔍
05/22/2006 +3 days 🔍
05/22/2006 +0 days 🔍
05/22/2006 +0 days 🔍
05/23/2006 +0 days 🔍
05/26/2006 +3 days 🔍
07/11/2006 +46 days 🔍
11/10/2007 +487 days 🔍
03/13/2021 +4872 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: kernel.org
Researcher: Solar Designer
Organization: Linux Kernel Team
Status: Not defined
Confirmation: 🔍

CVE: CVE-2006-0039 (🔍)
GCVE (CVE): GCVE-0-2006-0039
GCVE (VulDB): GCVE-100-2255

OVAL: 🔍

X-Force: 26583 - Linux kernel netfilter do_add_counters race condition, Medium Risk
SecurityFocus: 18113 - Linux Kernel Netfilter Do_Add_Counters Local Race Condition Vulnerability
Secunia: 20185 - Linux Kernel Netfilter Weakness and Two SCTP Vulnerabilities, Moderately Critical
OSVDB: 25696 - Linux Kernel SCTP Chunk Length Calculation Parameter Processing Overflow DoS
Vupen: ADV-2006-1893

See also: 🔍

Entryinfo

Created: 05/23/2006 11:09
Updated: 03/13/2021 06:09
Changes: 05/23/2006 11:09 (91), 08/25/2017 09:23 (9), 03/13/2021 06:09 (3)
Complete: 🔍
Cache ID: 216:5BA:103

Be aware that VulDB is the high quality source for vulnerability data.

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