Linux Kernel up to 2.6.15 strnlen_user denial of service

CVSS Meta Temp Score
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CTI Interest Score
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3.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 2.6.15 and classified as problematic. Affected is the function strnlen_user of the component strnlen_user. Performing a manipulation results in denial of service. This vulnerability is identified as CVE-2006-0456. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 2.6.15 (Operating System). This affects the function strnlen_user of the component strnlen_user. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

The strnlen_user function in Linux kernel before 2.6.16 on IBM S/390 can return an incorrect value, which allows local users to cause a denial of service via unknown vectors.

The bug was discovered 03/11/2006. The weakness was released 06/27/2006 by David Howells with Redhat (Website). The advisory is shared at vupen.com. This vulnerability is uniquely identified as CVE-2006-0456 since 01/27/2006. The exploitability is told to be easy. An attack has to be approached locally. No form of authentication is needed for exploitation. Technical details are known, 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 108 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 22276 (CentOS 4 : kernel (CESA-2006:0575)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 115389 (Linux Kernel Unspecified Socket Buffer Handling Remote Denial of Service Vulnerability).

Upgrading to version 2.6.16 eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (30090), Tenable (22276), SecurityFocus (BID 18687†), OSVDB (26997†) and Secunia (SA20914†). Entries connected to this vulnerability are available at VDB-2071, VDB-27880, VDB-30335 and VDB-30129. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.6

VulDB Base Score: 4.0
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 22276
Nessus Name: CentOS 4 : kernel (CESA-2006:0575)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 57028
OpenVAS Name: Debian Security Advisory DSA 1103-1 (kernel-source-2.6.8)
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 2.6.16

Timelineinfo

01/27/2006 🔍
03/11/2006 +43 days 🔍
06/27/2006 +108 days 🔍
06/27/2006 +0 days 🔍
06/27/2006 +0 days 🔍
06/27/2006 +0 days 🔍
07/04/2006 +7 days 🔍
08/23/2006 +50 days 🔍
08/30/2006 +7 days 🔍
07/18/2007 +322 days 🔍
03/12/2015 +2794 days 🔍
06/21/2025 +3754 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: vupen.com⛔
Researcher: David Howells
Organization: Redhat
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-0456 (🔍)
GCVE (CVE): GCVE-0-2006-0456
GCVE (VulDB): GCVE-100-31041

OVAL: 🔍

X-Force: 30090
SecurityFocus: 18687 - Linux Kernel IBM S/390 strnlen_user Local Vulnerability
Secunia: 20914
OSVDB: 26997 - CVE-2006-0456 - Linux - Denial of Service Issue
Vulnerability Center: 15636 - Linux Kernel before 2.6.16 on IBM S/390 Local Denial of Service, Medium
Vupen: ADV-2006-2554

See also: 🔍

Entryinfo

Created: 03/12/2015 14:25
Updated: 06/21/2025 22:17
Changes: 03/12/2015 14:25 (83), 07/22/2019 10:13 (4), 06/21/2025 22:17 (20)
Complete: 🔍
Cache ID: 216:D1C:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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