Linux Kernel up to 3.14.79 security/keys/keyring.c keyring_search_aux null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.5$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Kernel up to 3.14.79. Affected by this vulnerability is the function keyring_search_aux of the file security/keys/keyring.c. The manipulation results in null pointer dereference. This vulnerability was named CVE-2017-6951. The attack needs to be approached locally. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 3.14.79 (Operating System). Affected is the function keyring_search_aux of the file security/keys/keyring.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

The keyring_search_aux function in security/keys/keyring.c in the Linux kernel through 3.14.79 allows local users to cause a denial of service (NULL pointer dereference and OOPS) via a request_key system call for the "dead" type.

The bug was discovered 04/30/2018. The weakness was presented 03/16/2017 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-2017-6951 since 03/16/2017. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 99733 (Debian DLA-922-1 : linux security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170337 (SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2017:2389-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (99733) and SecurityFocus (BID 96943†). See VDB-99278, VDB-101078 and VDB-101107 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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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: 99733
Nessus Name: Debian DLA-922-1 : linux security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 871165
OpenVAS Name: RedHat Update for kernel RHSA-2017:1842-01
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

03/16/2017 🔍
03/16/2017 +0 days 🔍
03/16/2017 +0 days 🔍
03/17/2017 +1 days 🔍
03/17/2017 +0 days 🔍
03/17/2017 +0 days 🔍
04/28/2017 +41 days 🔍
05/01/2017 +3 days 🔍
04/30/2018 +364 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: securityfocus.com⛔
Status: Not defined

CVE: CVE-2017-6951 (🔍)
GCVE (CVE): GCVE-0-2017-6951
GCVE (VulDB): GCVE-100-98208
SecurityFocus: 96943 - Linux Kernel CVE-2017-6951 Local Denial of Service Vulnerability
OSVDB: - CVE-2017-6951 - Linux - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 03/17/2017 07:52
Changes: 03/17/2017 07:52 (82)
Complete: 🔍
Cache ID: 216:0C2:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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