Linux Kernel up to 4.15-rc7 net/netlink/af_netlink.c __netlink_ns_capable null pointer dereference

CVSS Meta Temp Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.15-rc7. It has been classified as problematic. This impacts the function __netlink_ns_capable of the file net/netlink/af_netlink.c. Performing a manipulation results in null pointer dereference. This vulnerability is known as CVE-2018-14646. Attacking locally is a requirement. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 4.15-rc7 (Operating System). This affects the function __netlink_ns_capable of the file net/netlink/af_netlink.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. The summary by CVE is:

The Linux kernel before 4.15-rc8 was found to be vulnerable to a NULL pointer dereference bug in the __netlink_ns_capable() function in the net/netlink/af_netlink.c file. A local attacker could exploit this when a net namespace with a netnsid is assigned to cause a kernel panic and a denial of service.

The bug was discovered 11/26/2018. The weakness was published 11/26/2018 as confirmed bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2018-14646 since 07/27/2018. The exploitability is told to be easy. An attack has to be approached locally. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 119251 (Scientific Linux Security Update : kernel on SL7.x x86_64 (20181127)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Scientific Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 237064 (Red Hat Update for kernel (RHSA-2018:3651)).

Upgrading to version 4.15-rc8 eliminates this vulnerability. A possible mitigation has been published 1 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (119251) and SecurityFocus (BID 105388†). Similar entries are available at VDB-124429, VDB-134452, VDB-134460 and VDB-134588. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 5.5
CNA Vector (Red Hat, Inc.): 🔍

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: 119251
Nessus Name: Scientific Linux Security Update : kernel on SL7.x x86_64 (20181127)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Kernel 4.15-rc8
Patch: git.kernel.org

Timelineinfo

07/27/2018 🔍
09/24/2018 +59 days 🔍
11/26/2018 +63 days 🔍
11/26/2018 +0 days 🔍
11/26/2018 +0 days 🔍
11/27/2018 +1 days 🔍
11/27/2018 +0 days 🔍
11/28/2018 +1 days 🔍
06/11/2023 +1656 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2018:3651
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-14646 (🔍)
GCVE (CVE): GCVE-0-2018-14646
GCVE (VulDB): GCVE-100-127125
SecurityFocus: 105388 - Linux Kernel 'chap_server_compute_md5()' Function Stack Buffer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 11/27/2018 08:01
Updated: 06/11/2023 13:52
Changes: 11/27/2018 08:01 (77), 04/14/2020 20:48 (5), 06/11/2023 13:46 (5), 06/11/2023 13:52 (12)
Complete: 🔍
Cache ID: 216::103

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