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.
6.2	$0-$5k	0.00

A vulnerability, which was classified as critical, was found in Linux Kernel (Operating System). Affected is the function make_indexed_dir. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

The make_indexed_dir function in fs/ext4/namei.c in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 does not validate a certain rec_len field, which allows local users to cause a denial of service (OOPS) by attempting to mount a crafted ext4 filesystem.

The issue has been introduced in 10/09/2008. The weakness was shared 02/27/2009 (Website). The advisory is shared for download at xforce.iss.net. This vulnerability is traded as CVE-2009-0746. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 139 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 43779 (CentOS 5 : kernel (CESA-2009:1243)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175171 (Debian Security Update for Linux-2.6 (DSA-1749)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (48872) and Tenable (43779). The entries 46886, 46885, 46883 and 45918 are related to this item.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 2.6.27
• 2.6.27.1
• 2.6.27.2
• 2.6.27.3
• 2.6.27.4
• 2.6.27.5
• 2.6.27.6
• 2.6.27.7
• 2.6.27.8
• 2.6.27.9
• 2.6.27.10
• 2.6.27.11
• 2.6.27.12
• 2.6.27.13
• 2.6.27.14
• 2.6.27.15
• 2.6.27.16
• 2.6.27.17
• 2.6.27.18
• 2.6.28
• 2.6.28.1
• 2.6.28.2
• 2.6.28.3
• 2.6.28.4
• 2.6.28.5
• 2.6.28.6

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 43779
Nessus Name: CentOS 5 : kernel (CESA-2009:1243)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 63681
OpenVAS Name: Debian Security Advisory DSA 1749-1 (linux-2.6)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/09/2008 🔍
02/20/2009 +134 days 🔍
02/24/2009 +4 days 🔍
02/27/2009 +2 days 🔍
02/27/2009 +0 days 🔍
02/27/2009 +0 days 🔍
09/08/2009 +193 days 🔍
03/17/2015 +2016 days 🔍
08/04/2021 +2332 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: xforce.iss.net
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-0746 (🔍)
OVAL: 🔍

X-Force: 48872
Vulnerability Center: 23424 - Linux Kernel 2.6.27-2.6.27.18 and 2.6.28-2.6.28.6 make_indexed_dir Function Local DoS Vulnerability, Medium
OSVDB: 52202 - Linux Kernel fs/ext4/namei.c make_indexed_dir() Function Ext4 File System Handling DoS

See also: 🔍

Entryinfo

Created: 03/17/2015 16:11
Updated: 08/04/2021 18:31
Changes: 03/17/2015 16:11 (61), 02/13/2017 16:56 (9), 08/04/2021 18:23 (4), 08/04/2021 18:31 (1)
Complete: 🔍

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