Linux Kernel 2.6.x ext3fs_dirhash denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel 2.6.x. The impacted element is the function ext3fs_dirhash. Such manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2006-6053. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel 2.6.x (Operating System). Affected by this issue is the function ext3fs_dirhash. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

The ext3fs_dirhash function in Linux kernel 2.6.x allows local users to cause a denial of service (crash) via an ext3 stream with malformed data structures.

The bug was discovered 11/12/2006. The weakness was disclosed 11/21/2006 (Website). The advisory is shared for download at vupen.com. This vulnerability is handled as CVE-2006-6053 since 11/21/2006. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. 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 9 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 36838 (CentOS 4 : kernel (CESA-2007:0014)), 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 115509 (Red Hat Kernel Security Update (RHSA-2007:0014)).

Upgrading 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 (30217), Tenable (36838), SecurityFocus (BID 19702†), OSVDB (30293†) and Secunia (SA22776†). The entries VDB-2551, VDB-2589, VDB-2647 and VDB-2661 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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: 5.6

VulDB Base Score: 6.2
VulDB Temp Score: 5.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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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: 36838
Nessus Name: CentOS 4 : kernel (CESA-2007:0014)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

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: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

11/12/2006 🔍
11/12/2006 +0 days 🔍
11/13/2006 +1 days 🔍
11/21/2006 +8 days 🔍
11/21/2006 +0 days 🔍
11/21/2006 +0 days 🔍
01/31/2007 +71 days 🔍
02/04/2007 +4 days 🔍
04/23/2009 +809 days 🔍
03/12/2015 +2149 days 🔍
04/28/2026 +4065 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: vupen.com⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-6053 (🔍)
GCVE (CVE): GCVE-0-2006-6053
GCVE (VulDB): GCVE-100-33392

OVAL: 🔍

X-Force: 30217
SecurityFocus: 19702
Secunia: 22776 - Fedora Core Ext3 File System Denial of Service Vulnerability, Not Critical
OSVDB: 30293 - CVE-2006-6053 - Linux Kernel - Denial-of-service Issue
Vulnerability Center: 14201 - Linux Kernel 2.6.* ext3fs_dirhash Function Local DoS via a Malformed ext3 Stream, Medium
Vupen: ADV-2006-4458

See also: 🔍

Entryinfo

Created: 03/12/2015 22:21
Updated: 04/28/2026 12:43
Changes: 03/12/2015 22:21 (73), 07/14/2019 11:54 (11), 04/28/2026 12:43 (19)
Complete: 🔍
Cache ID: 216::103

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