Linux Kernel up to 4.11.4 security/keys/keyctl.c null pointer dereference

CVSS Meta Temp Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 4.11.4. This affects an unknown part of the file security/keys/keyctl.c. The manipulation results in null pointer dereference. This vulnerability is reported as CVE-2017-15274. The attack requires a local approach. No exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 4.11.4 (Operating System). Affected is some unknown functionality of the file security/keys/keyctl.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:

security/keys/keyctl.c in the Linux kernel before 4.11.5 does not consider the case of a NULL payload in conjunction with a nonzero length value, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via a crafted add_key or keyctl system call, a different vulnerability than CVE-2017-12192.

The bug was discovered 10/11/2017. The weakness was disclosed 10/12/2017 as confirmed git commit (GIT Repository). The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2017-15274 since 10/11/2017. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 104180 (Amazon Linux AMI : kernel (ALAS-2017-914) (BlueBorne)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351124 (Amazon Linux Security Advisory for kernel: ALAS-2017-914).

Upgrading to version 4.11.5 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (104180) and SecurityFocus (BID 101292†). The entries VDB-100475, VDB-107418 and VDB-107763 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
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: 104180
Nessus Name: Amazon Linux AMI : kernel (ALAS-2017-914) (BlueBorne)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 864875
OpenVAS Name: Ubuntu Update for linux USN-3583-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kernel 4.11.5
Patch: git.kernel.org

Timelineinfo

10/11/2017 🔍
10/11/2017 +0 days 🔍
10/11/2017 +0 days 🔍
10/11/2017 +0 days 🔍
10/12/2017 +1 days 🔍
10/12/2017 +0 days 🔍
10/26/2017 +14 days 🔍
10/27/2017 +1 days 🔍
01/03/2023 +1894 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2019:1946
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-15274 (🔍)
GCVE (CVE): GCVE-0-2017-15274
GCVE (VulDB): GCVE-100-107802
SecurityFocus: 101292 - Linux kernel CVE-2017-15274 Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 10/12/2017 10:18
Updated: 01/03/2023 11:21
Changes: 10/12/2017 10:18 (75), 11/24/2019 13:06 (9), 01/03/2023 11:21 (4)
Complete: 🔍
Cache ID: 216::103

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