Linux Kernel 2.6 user_update access control

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel 2.6. It has been classified as problematic. The impacted element is the function user_update. The manipulation leads to access control. This vulnerability is listed as CVE-2011-4110. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel 2.6 (Operating System). This issue affects the function user_update. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is availability. The summary by CVE is:

The user_update function in security/keys/user_defined.c in the Linux kernel 2.6 allows local users to cause a denial of service (NULL pointer dereference and kernel oops) via vectors related to a user-defined key and "updating a negative key into a fully instantiated key."

The weakness was presented 01/27/2012 as Bug 751297 as confirmed bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. The identification of this vulnerability is CVE-2011-4110. 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 attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 56941 (Fedora 16 : kernel-3.1.2-1.fc16 (2011-16237)), 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 216036 (VMware ESXi and ESX Third Party Libraries Updates (VMSA-2012-0013)).

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 (71424), Tenable (56941), SecurityFocus (BID 50755†) and Vulnerability Center (SBV-33957†). See VDB-4416, VDB-5260, VDB-56641 and VDB-60957 for similar entries. Be aware that VulDB is the high quality 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: 4.0
VulDB Meta Temp Score: 4.0

VulDB Base Score: 4.0
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
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: 56941
Nessus Name: Fedora 16 : kernel-3.1.2-1.fc16 (2011-16237)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 892389
OpenVAS Name: Debian Security Advisory DSA 2389-1 (linux-2.6 - privilege escalation/denial of service/information leak
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

10/18/2011 🔍
11/21/2011 +34 days 🔍
11/26/2011 +5 days 🔍
11/29/2011 +3 days 🔍
01/27/2012 +59 days 🔍
01/27/2012 +0 days 🔍
03/23/2015 +1151 days 🔍
11/29/2021 +2443 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Bug 751297
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-4110 (🔍)
GCVE (CVE): GCVE-0-2011-4110
GCVE (VulDB): GCVE-100-60023

OVAL: 🔍
IAVM: 🔍

X-Force: 71424
SecurityFocus: 50755
Secunia: 47754
Vulnerability Center: 33957 - Linux Kernel 2.6.37 and Earlier User Defined Key Types Null Pointer Dereference Allows DoS, Medium

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 11/29/2021 08:41
Changes: 03/23/2015 16:50 (66), 04/05/2017 14:59 (7), 11/29/2021 08:37 (5), 11/29/2021 08:41 (1)
Complete: 🔍
Cache ID: 216::103

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