Linux Kernel up to 2.6.28.6 ext4_fill_super input validation

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

A vulnerability was found in Linux Kernel (Operating System) and classified as critical. Affected by this issue is the function ext4_fill_super. 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. CVE summarizes:

The ext4_fill_super function in fs/ext4/super.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 the superblock configuration, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) by attempting to mount a crafted ext4 filesystem.

The issue has been introduced in 10/09/2008. The weakness was released 02/27/2009 (Website). The advisory is available at vupen.com. This vulnerability is handled as CVE-2009-0748. The exploitation is known to be easy. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

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 (48873) and Tenable (43779). Entries connected to this vulnerability are available at 43496, 46885, 46884 and 46883.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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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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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

CVE: CVE-2009-0748 (🔍)
OVAL: 🔍

X-Force: 48873
Vulnerability Center: 23426 - Linux Kernel 2.6.27-2.6.27.18 and 2.6.28-2.6.28.6 ext4_fill_super Function Local DoS Vulnerability, Medium
OSVDB: 52203 - Linux Kernel fs/ext4/super.c ext4_fill_super() Function Ext4 File System Superblock Handling DoS

See also: 🔍

Entryinfo

Created: 03/17/2015 16:11
Updated: 08/04/2021 19:02
Changes: 03/17/2015 16:11 (61), 02/13/2017 16:56 (9), 08/04/2021 18:53 (4), 08/04/2021 19:02 (1)
Complete: 🔍

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