SB2021051005 - Multiple vulnerabilities in MikroTik RouterOS
Published: May 10, 2021 Updated: June 1, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Reachable Assertion (CVE-ID: CVE-2020-20214)
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)
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)
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)
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.