VDB-113848 · CVE-2018-7492 · Nessus 109517

Linux Kernel up to 4.14.6 net/rds/rdma.c __rds_rdma_map null pointer dereference

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 4.14.6. This impacts the function __rds_rdma_map of the file net/rds/rdma.c. Executing a manipulation can lead to null pointer dereference. This vulnerability appears as CVE-2018-7492. The attack requires local access. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.14.6 (Operating System). It has been declared as critical. This vulnerability affects the function __rds_rdma_map of the file net/rds/rdma.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

A NULL pointer dereference was found in the net/rds/rdma.c __rds_rdma_map() function in the Linux kernel before 4.14.7 allowing local attackers to cause a system panic and a denial-of-service, related to RDS_GET_MR and RDS_GET_MR_FOR_DEST.

The bug was discovered 02/27/2018. The weakness was presented 02/26/2018 (Website). The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2018-7492 since 02/26/2018. The attack needs to be approached locally. The successful exploitation requires a single authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 109517 (Debian DSA-4187-1 : linux - security update (Spectre)), 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 157820 (Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2018-4245)).

Upgrading to version 4.14.7 eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (109517), SecurityFocus (BID 103185†) and CERT Bund (WID-SEC-2022-0532). See VDB-105729, VDB-114578, VDB-115837 and VDB-117579 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

Oracle Linux
Debian Linux
Open Source Linux Kernel
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle VM
NetApp FAS
Avaya Aura Communication Manager
Avaya Aura Session Manager
Avaya Aura Application Enablement Services
Avaya Aura System Manager
Avaya Aura Experience Portal
NetApp AFF

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

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: 109517
Nessus Name: Debian DSA-4187-1 : linux - security update (Spectre)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 61945
OpenVAS Name: Ubuntu Update for linux-aws USN-3619-2
OpenVAS File: 🔍
OpenVAS Family: 🔍

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 4.14.7
Patch: git.kernel.org

Timelineinfo

02/26/2018 🔍
02/26/2018 +0 days 🔍
02/26/2018 +0 days 🔍
02/27/2018 +1 days 🔍
02/27/2018 +0 days 🔍
02/27/2018 +0 days 🔍
05/01/2018 +63 days 🔍
05/02/2018 +1 days 🔍
09/14/2025 +2692 days 🔍