Mikrotik RouterOs before 6.47 (stable tree) suffers from a divison by zero vulnerability in the /nova/bin/lcdstat process. An authenticated remote attacker can cause a Denial of Service due to a divide by zero error.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-20253
Reference (s):
- FULLDISC:20210507 Re: Four vulnerabilities found in MikroTik’s RouterOS
- URL: http://seclists.org/fulldisclosure/2021/May/14
- https://github.com/cq674350529/pocs_slides/blob/master/pocs/MikroTik/vul_lcdstat_4/README.md