VDB-110109 · CVE-2017-15116 · RHSA-2018:1062

Linux Kernel up to 4.1 crypto/rng.c rngapi_reset 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.
4.3	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 4.1. Affected is the function rngapi_reset of the file crypto/rng.c. Performing a manipulation results in null pointer dereference. This vulnerability is cataloged as CVE-2017-15116. The attack must be initiated from a local position. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 4.1 (Operating System). This affects the function rngapi_reset of the file crypto/rng.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 rngapi_reset function in crypto/rng.c in the Linux kernel before 4.2 allows attackers to cause a denial of service (NULL pointer dereference).

The bug was discovered 10/08/2017. The weakness was shared 11/30/2017 (Website). The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2017-15116 since 10/08/2017. 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 was handled as a non-public zero-day exploit for at least 53 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 109380 (CentOS 7 : kernel (CESA-2018:1062)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236711 (Red Hat Update for kernel-rt (RHSA-2018:0676)).

Upgrading to version 4.2 eliminates this vulnerability. A possible mitigation has been published 6 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (109380). The entries VDB-106966, VDB-110043, VDB-110311 and VDB-111673 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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: 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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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 109380
Nessus Name: CentOS 7 : kernel (CESA-2018:1062)
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 4.2
Patch: git.kernel.org

Timelineinfo

10/08/2017 🔍
10/08/2017 +0 days 🔍
11/30/2017 +53 days 🔍
11/30/2017 +0 days 🔍
12/01/2017 +1 days 🔍
04/27/2018 +147 days 🔍
04/27/2018 +0 days 🔍
01/16/2023 +1725 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2018:1062
Status: Not defined

CVE: CVE-2017-15116 (🔍)
GCVE (CVE): GCVE-0-2017-15116
GCVE (VulDB): GCVE-100-110109
See also: 🔍

Entryinfo

Created: 12/01/2017 08:08
Updated: 01/16/2023 14:56
Changes: 12/01/2017 08:08 (69), 12/11/2019 15:44 (6), 01/16/2023 14:52 (5), 01/16/2023 14:56 (1)
Complete: 🔍
Cache ID: 216::103

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