MikroTik RouterOS update for IRC NAT helper

Published: 2022-10-18
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-2663
Exploitation vector Network
Public exploit N/A
Vulnerable software
MikroTik RouterOS
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor MikroTik

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU67510

Risk: Medium


CVE-ID: CVE-2022-2663

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No


The vulnerability allows a remote attacker to bypass firewall rules.

The vulnerability exists due to insufficient validation of user-supplied input in nf_conntrack_irc in Linux kernel. A remote attacker can send unencrypted IRC with nf_conntrack_irc configured and bypass configured firewall rules.


Install update from vendor's website.

Vulnerable software versions

MikroTik RouterOS: 7.4 - 7.4.1, 7.3 - 7.3.1, 7.2 - 7.2.3, 7.1 - 7.1.5

CPE2.3 External links


Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?