Linux Kernel 2.6.x superblock_doinit null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel 2.6.x. It has been classified as problematic. Affected is the function superblock_doinit. The manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2006-6056. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel 2.6.x (Operating System) and classified as problematic. This issue affects the function superblock_doinit. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

Linux kernel 2.6.x up to 2.6.18 and possibly other versions, when SELinux hooks are enabled, allows local users to cause a denial of service (crash) via a malformed file stream that triggers a NULL pointer dereference in the superblock_doinit function, as demonstrated using an HFS filesystem image.

The bug was discovered 11/14/2006. The weakness was published 11/21/2006 (Website). It is possible to read the advisory at projects.info-pull.com. The identification of this vulnerability is CVE-2006-6056 since 11/21/2006. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 24944 (Mandrake Linux Security Advisory : kernel (MDKSA-2007:078)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 115509 (Red Hat Kernel Security Update (RHSA-2007:0014)).

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 (30278), Tenable (24944), SecurityFocus (BID 22625†), OSVDB (30297†) and Secunia (SA22887†). Similar entries are available at VDB-2551, VDB-2589, VDB-2647 and VDB-2661. 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: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.2
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 24944
Nessus Name: Mandrake Linux Security Advisory : kernel (MDKSA-2007:078)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 58357
OpenVAS Name: Debian Security Advisory DSA 1304-1 (kernel-source-2.6.8)
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

11/14/2006 🔍
11/15/2006 +1 days 🔍
11/21/2006 +6 days 🔍
11/21/2006 +0 days 🔍
11/21/2006 +0 days 🔍
11/21/2006 +0 days 🔍
02/04/2007 +75 days 🔍
04/04/2007 +59 days 🔍
04/05/2007 +1 days 🔍
03/12/2015 +2898 days 🔍
07/14/2019 +1585 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: projects.info-pull.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2006-6056 (🔍)
GCVE (CVE): GCVE-0-2006-6056
GCVE (VulDB): GCVE-100-33395

OVAL: 🔍

X-Force: 30278
SecurityFocus: 22625
Secunia: 22887 - Fedora Core SELinux "superblock_doinit()" Denial of Service, Not Critical
OSVDB: 30297 - CVE-2006-6056 - Linux Kernel - Denial-of-service Issue
Vulnerability Center: 14202 - Linux Kernel 2.6-2.6.18 with SELinux Hooks Enabled Allows Local DoS via a Malformed File Stream, Medium

See also: 🔍

Entryinfo

Created: 03/12/2015 22:21
Updated: 07/14/2019 12:02
Changes: 03/12/2015 22:21 (74), 07/14/2019 12:02 (10)
Complete: 🔍
Cache ID: 216:4C9:103

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