Linux Kernel 2.6.16 Netfilter do_add_counters race condition

CVSS Meta Temp Score
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5.7$0-$5k0.00

A vulnerability was found in Linux Kernel 2.6.16 (Operating System). It has been classified as problematic. Affected is the function do_add_counters of the component Netfilter. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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 bug was discovered 05/16/2006. The weakness was released 05/22/2006 by Solar Designer (Website). The advisory is shared for download at kernel.org. This vulnerability is traded as CVE-2006-0039 since 12/20/2005. The attack can only be initiated within the local network. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

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 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) and Tenable (27886). Entries connected to this vulnerability are available at 2254, 2255, 2257 and 2379.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
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CVSSv2info

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Exploitinginfo

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

Local: No
Remote: Partially

Availability: 🔍
Status: Proof-of-Concept

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

Qualys ID: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Patch: kernel.org

Timelineinfo

12/20/2005 🔍
03/20/2006 +90 days 🔍
05/16/2006 +57 days 🔍
05/16/2006 +0 days 🔍
05/19/2006 +3 days 🔍
05/22/2006 +3 days 🔍
05/22/2006 +0 days 🔍
05/23/2006 +0 days 🔍
05/26/2006 +3 days 🔍
07/11/2006 +46 days 🔍
10/16/2006 +97 days 🔍
11/10/2007 +390 days 🔍
07/09/2019 +4259 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: kernel.org
Researcher: Solar Designer
Status: Not defined
Confirmation: 🔍

CVE: CVE-2006-0039 (🔍)
OVAL: 🔍

X-Force: 26583
Vulnerability Center: 12902 - Linux Kernel Race Condition In the do_add_counters Function in Netfilter, Low
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: 25697 - Linux Kernel Netfilter do_add_counters() Function Local Memory Disclosure
Vupen: ADV-2006-1893

See also: 🔍

Entryinfo

Created: 05/23/2006 11:09
Updated: 07/09/2019 10:13
Changes: 05/23/2006 11:09 (94), 07/09/2019 10:13 (5)
Complete: 🔍

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