SB2021051005 - Multiple vulnerabilities in MikroTik RouterOS

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Main Vulnerability Database SB2021051005

SB2021051005 - Multiple vulnerabilities in MikroTik RouterOS

Published: May 10, 2021 Updated: June 1, 2021

Security Bulletin ID SB2021051005
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Reachable Assertion (CVE-ID: CVE-2020-20214)

CWE-ID: CWE-617 - Reachable Assertion

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion within the btest process. A remote authenticated user can send specially crafted packet to the system and trigger an assertion failure.


2) NULL pointer dereference (CVE-ID: CVE-2020-20222)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the sniffer process. A remote authenticated user can pass specially crafted data to the system and perform a denial of service (DoS) attack.


3) Buffer overflow (CVE-ID: CVE-2020-20236)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error within the sniffer process. A remote authenticated user can pass specially crafted data to the system, trigger invalid memory access and crash the affected process.


4) Buffer overflow (CVE-ID: CVE-2020-20237)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error within the sniffer process. A remote authenticated user can pass specially crafted data to the system, trigger invalid memory access and crash the affected process.


Remediation

Install update from vendor's website.

References