Linux Kernel 2.6.31 d_delete null pointer dereference

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

Summaryinfo

A vulnerability was found in Linux Kernel 2.6.31. It has been declared as problematic. The impacted element is the function d_delete. Such manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2009-2908. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel 2.6.31 (Operating System). Affected by this issue is the function d_delete. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

The d_delete function in fs/ecryptfs/inode.c in eCryptfs in the Linux kernel 2.6.31 allows local users to cause a denial of service (kernel OOPS) and possibly execute arbitrary code via unspecified vectors that cause a "negative dentry" and trigger a NULL pointer dereference, as demonstrated via a Mutt temporary directory in an eCryptfs mount.

The issue has been introduced in 09/09/2009. The weakness was published 10/13/2009 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is handled as CVE-2009-2908. 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.

The vulnerability was handled as a non-public zero-day exploit for at least 34 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 42156 (Fedora 10 : kernel-2.6.27.37-170.2.104.fc10 (2009-10525)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 116971 (VMware ESX Service Console and vMA Third Party Updates (VMSA-2010-0004)).

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 (53693), Tenable (42156), SecurityFocus (BID 36639†) and Vulnerability Center (SBV-23779†). Similar entries are available at VDB-47137, VDB-50482, VDB-50329 and VDB-50279. Once again VulDB remains the best source 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: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 42156
Nessus Name: Fedora 10 : kernel-2.6.27.37-170.2.104.fc10 (2009-10525)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 66098
OpenVAS Name: Debian Security Advisory DSA 1915-1 (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

08/20/2009 🔍
09/09/2009 +20 days 🔍
10/08/2009 +29 days 🔍
10/08/2009 +0 days 🔍
10/13/2009 +5 days 🔍
10/13/2009 +0 days 🔍
10/16/2009 +3 days 🔍
10/20/2009 +4 days 🔍
03/18/2015 +1975 days 🔍
08/23/2021 +2350 days 🔍

Sourcesinfo

Vendor: kernel.org

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

CVE: CVE-2009-2908 (🔍)
GCVE (CVE): GCVE-0-2009-2908
GCVE (VulDB): GCVE-100-50420

OVAL: 🔍

X-Force: 53693
SecurityFocus: 36639 - Linux Kernel eCryptfs Lower Dentry Null Pointer Dereference Local Denial of Service Vulnerability
Vulnerability Center: 23779 - Linux Kernel 2.6.31 eCryptfs Local DoS and Code Execution Vulnerability, High

See also: 🔍

Entryinfo

Created: 03/18/2015 15:15
Updated: 08/23/2021 16:14
Changes: 03/18/2015 15:15 (64), 02/15/2017 14:05 (9), 08/23/2021 16:06 (4), 08/23/2021 16:14 (1)
Complete: 🔍
Cache ID: 216::103

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