Linux Kernel up to 4.1 crypto/rng.c rngapi_reset null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.3$0-$5k0.00

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).

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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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: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 109380
Nessus Name: CentOS 7 : kernel (CESA-2018:1062)
Nessus File: 🔍
Nessus Risk: 🔍
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Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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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 (🔍)

Entryinfo

Created: 12/01/2017 08:08 AM
Updated: 01/16/2023 02:56 PM
Changes: 12/01/2017 08:08 AM (69), 12/11/2019 03:44 PM (6), 01/16/2023 02:52 PM (5), 01/16/2023 02:56 PM (1)
Complete: 🔍
Cache ID: 44:E4D:40

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