2020-20231 | MikroTik RouterOS detnet 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 (≈)

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CTI Interest Score

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4.2 $0-$5k 0.45

A vulnerability was found in MikroTik RouterOS up to 6.48.3 (Router Operating System). It has been rated as problematic. Affected by this issue is an unknown functionality of the file /nova/bin/detnet. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-476. Impacted is availability. CVE summarizes:

Mikrotik RouterOs through stable version 6.48.3 suffers from a memory corruption vulnerability in the /nova/bin/detnet process. An authenticated remote attacker can cause a Denial of Service (NULL pointer dereference).

The weakness was released 07/15/2021. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2020-20231 since 08/13/2020. The exploitation is known to be easy. The attack may be launched remotely. The successful exploitation needs a simple authentication. There are known technical details, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Type

Vendor

Name

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

AV AC Au C I A
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Vector Complexity Authentication Confidentiality Integrity Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Class: Denial of service
CWE: CWE-476
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒


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Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

08/13/2020 CVE assigned
07/15/2021 +336 days Advisory disclosed
07/15/2021 +0 days VulDB entry created
07/18/2021 +3 days VulDB last updateAdvisory: github.com
Status: Not defined

CVE: CVE-2020-20231 (🔒)

Created: 07/15/2021 08:31
Updated: 07/18/2021 15:39
Changes: (2) source_cve_assigned source_cve_nvd_summary
Complete: 🔍

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