Linux Kernel up to 2.6.28.6 ext4_group_add input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel. Affected by this issue is the function ext4_group_add. The manipulation leads to input validation. This vulnerability is listed as CVE-2009-0745. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel (Operating System). This issue affects the function ext4_group_add. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

The ext4_group_add function in fs/ext4/resize.c in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 does not properly initialize the group descriptor during a resize (aka resize2fs) operation, which might allow local users to cause a denial of service (OOPS) by arranging for crafted values to be present in available memory.

The issue has been introduced in 10/09/2008. The weakness was presented 02/27/2009 (Website). It is possible to read the advisory at vupen.com. The identification of this vulnerability is CVE-2009-0745. 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 141 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 40835 (RHEL 5 : kernel (RHSA-2009:1243)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat 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 (49073), Tenable (40835), Secunia (SA34394†) and Vulnerability Center (SBV-23423†). See VDB-43496, VDB-46886, VDB-46885 and VDB-46884 for similar entries. 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: 6.2

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

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: 40835
Nessus Name: RHEL 5 : kernel (RHSA-2009:1243)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

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 🔍
02/27/2009 +140 days 🔍
02/27/2009 +0 days 🔍
02/27/2009 +0 days 🔍
02/27/2009 +0 days 🔍
09/02/2009 +187 days 🔍
09/08/2009 +6 days 🔍
03/17/2015 +2016 days 🔍
04/26/2025 +3693 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: vupen.com⛔
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-0745 (🔍)
GCVE (CVE): GCVE-0-2009-0745
GCVE (VulDB): GCVE-100-46883

OVAL: 🔍

X-Force: 49073
Secunia: 34394
Vulnerability Center: 23423 - Linux Kernel 2.6.27 -2.6.27.18 and 2.6.28 -2.6.28.6 ext4_group_add Function Local DoS Vulnerability, Medium

See also: 🔍

Entryinfo

Created: 03/17/2015 16:11
Updated: 04/26/2025 11:11
Changes: 03/17/2015 16:11 (63), 02/13/2017 16:55 (6), 08/04/2021 18:09 (4), 08/04/2021 18:16 (1), 04/26/2025 11:11 (15)
Complete: 🔍
Cache ID: 216:E6A:103

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