Linux Kernel 2.6.16.59 null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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2.9$0-$5k0.00

A vulnerability was found in Linux Kernel 2.6.16.59 (Operating System) and classified as problematic. This issue affects some unknown functionality. 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. The summary by CVE is:

mm/shmem.c in the Linux kernel before 2.6.28-rc8, when strict overcommit is enabled and CONFIG_SECURITY is disabled, does not properly handle the export of shmemfs objects by knfsd, which allows attackers to cause a denial of service (NULL pointer dereference and knfsd crash) or possibly have unspecified other impact via unknown vectors. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-1643.

The issue has been introduced in 03/20/2006. The weakness was disclosed 06/03/2010 by Brad Spengler as Bug 595970 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2008-7256. The exploitation is known to be difficult. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1536 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 49666 (Mandriva Linux Security Advisory : kernel (MDVSA-2010:188)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks.

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 (59224), Tenable (49666), SecurityFocus (BID 38393†) and Vulnerability Center (SBV-26725†). The entry VDB-53450 is pretty similar.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 2.9
VulDB Meta Temp Score: 2.9

VulDB Base Score: 2.9
VulDB Temp Score: 2.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 49666
Nessus Name: Mandriva Linux Security Advisory : kernel (MDVSA-2010:188)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 831170
OpenVAS Name: Mandriva Update for kernel MDVSA-2010:188 (kernel)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/20/2006 🔍
12/02/2008 +988 days 🔍
02/24/2010 +449 days 🔍
06/03/2010 +98 days 🔍
06/03/2010 +0 days 🔍
06/03/2010 +0 days 🔍
08/09/2010 +67 days 🔍
09/24/2010 +46 days 🔍
03/19/2015 +1637 days 🔍
09/14/2021 +2371 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 595970
Researcher: Brad Spengler
Status: Not defined
Confirmation: 🔍

CVE: CVE-2008-7256 (🔍)
OVAL: 🔍

X-Force: 59224
SecurityFocus: 38393 - Linux Kernel TSB I-TLB Load Local Privilege Escalation Vulnerability
Vulnerability Center: 26725 - Linux Kernel 2.6.34-rc5 and Prior mm/shmem.c Local DoS Vulnerability via Unknown Vectors, Low

See also: 🔍

Entryinfo

Created: 03/19/2015 12:22 PM
Updated: 09/14/2021 04:03 PM
Changes: 03/19/2015 12:22 PM (63), 03/02/2017 11:03 AM (10), 09/14/2021 03:58 PM (4), 09/14/2021 04:03 PM (1)
Complete: 🔍
Cache ID: 18:ED1:40

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