Incorrect permission assignment for critical resource in MikroTik RouterOS - CVE-2019-3978
Published: October 30, 2019 / Updated: June 17, 2021
Vulnerability identifier: #VU22426
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-3978
CWE-ID: CWE-732
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to perform DNS cache poisoning attacks.
The vulnerability exists due to RouterOS allows a remote attacker to initiate DNS queries via port 8291/TCP. A remote attacker can force the router to send DNS requests to an attacker-contorted server and poison router's DNS cache.
Affected software
MikroTik RouterOS
How to mitigate CVE-2019-3978
Install updates from vendor's website.
MikroTik RouterOS - addressed in versions 6.44.6, 6.45.7