Linux Kernel up to 2.6.17.10 smbfs deadlock

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.8$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Kernel up to 2.6.17.10. The affected element is an unknown function of the component smbfs. Such manipulation leads to deadlock. This vulnerability is documented as CVE-2006-5158. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 2.6.17.10 (Operating System). Affected by this issue is an unknown code block of the component smbfs. The manipulation with an unknown input leads to a deadlock vulnerability. Using CWE to declare the problem leads to CWE-833. The product contains multiple threads or executable segments that are waiting for each other to release a necessary lock, resulting in deadlock. Impacted is availability. CVE summarizes:

The nlmclnt_mark_reclaim in clntlock.c in NFS lockd in Linux kernel before 2.6.16 allows remote attackers to cause a denial of service (process crash) and deny access to NFS exports via unspecified vectors that trigger a kernel oops (null dereference) and a deadlock.

The bug was discovered 12/16/2005. The weakness was released 12/14/2006 by Bill Allombert (ryan) (Website). The advisory is shared for download at ubuntu.com. This vulnerability is handled as CVE-2006-5158 since 10/03/2006. Access to the local network is required for this attack. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 293 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 67520 (Oracle Linux 4 : kernel (ELSA-2007-0488)), 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 156118 (Oracle Enterprise Linux Update for Kernel (ELSA-2007-0488)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at ftp.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 7 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (67520), SecurityFocus (BID 21581†), OSVDB (30923†), Secunia (SA26289†) and Vulnerability Center (SBV-14468†). Entries connected to this vulnerability are available at VDB-2755, VDB-2752, VDB-2754 and VDB-2751. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Deadlock
CWE: CWE-833 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 67520
Nessus Name: Oracle Linux 4 : kernel (ELSA-2007-0488)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 830023
OpenVAS Name: Zoho ManageEngine Support Center Plus Multiple Fields XSS Vulnerabilities
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: 🔍

Patch: ftp.kernel.org

Timelineinfo

12/16/2005 🔍
12/20/2005 +4 days 🔍
12/20/2005 +0 days 🔍
10/03/2006 +287 days 🔍
10/05/2006 +2 days 🔍
12/14/2006 +70 days 🔍
12/18/2006 +4 days 🔍
12/24/2006 +6 days 🔍
02/28/2007 +65 days 🔍
06/26/2007 +118 days 🔍
07/31/2007 +35 days 🔍
07/12/2013 +2173 days 🔍
04/23/2026 +4668 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: ubuntu.com
Researcher: Bill Allombert (ryan)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-5158 (🔍)
GCVE (CVE): GCVE-0-2006-5158
GCVE (VulDB): GCVE-100-2756

OVAL: 🔍

SecurityFocus: 21581 - Linux Kernel NFS LockD Dereference Remote Denial of Service Vulnerability
Secunia: 26289 - Avaya Products Linux Kernel Multiple Vulnerabilities, Moderately Critical
OSVDB: 30923 - Linux NFS lockd nlmclnt_mark_reclaim Function DoS
Vulnerability Center: 14468 - Linux Kernel NFS lockd Denial of Service, Low

See also: 🔍

Entryinfo

Created: 12/18/2006 10:23
Updated: 04/23/2026 15:01
Changes: 12/18/2006 10:23 (95), 07/15/2019 21:13 (2), 04/23/2026 15:01 (30)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!