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 has been found in Linux Kernel (Operating System) and classified as critical. Affected by this vulnerability is the function ext4_isize. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. The summary by CVE is:

The ext4_isize function in fs/ext4/ext4.h in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 uses the i_size_high structure member during operations on arbitrary types of files, which allows local users to cause a denial of service (CPU consumption and error-message flood) by attempting to mount a crafted ext4 filesystem.

The issue has been introduced in 10/09/2008. The weakness was published 02/27/2009 as Bug 12375 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.kernel.org. This vulnerability is known as CVE-2009-0747. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 141 days. During that time the estimated underground price was around $0-$5k. 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 (49071) and Tenable (43779). Similar entries are available at 46886, 46884, 46883 and 45918.

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: Resource management
CWE: CWE-399 / CWE-404
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 🔍
02/27/2009 +6 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: Bug 12375
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-0747 (🔍)
OVAL: 🔍

X-Force: 49071
Vulnerability Center: 23425 - Linux Kernel 2.6.27-2.6.27.18 and 2.6.28-2.6.28.6 ext4_isize Function Local DoS Vulnerability, Medium

See also: 🔍

Entryinfo

Created: 03/17/2015 16:11
Updated: 08/04/2021 18:46
Changes: 03/17/2015 16:11 (61), 02/13/2017 16:56 (8), 08/04/2021 18:39 (4), 08/04/2021 18:46 (1)
Complete: 🔍

Discussion

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