PT-2021-10464 · Mikrotik · Routeros+1

Published 2021-05-18 · Updated 2021-05-25 · CVE-2020-20253

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Mikrotik RouterOs versions prior to 6.47

Description: The issue is related to a division by zero error in the /nova/bin/lcdstat process. An authenticated remote attacker can cause a Denial of Service due to this error.

Recommendations: For versions prior to 6.47, update to version 6.47 or later to resolve the issue. As a temporary workaround, consider restricting access to the /nova/bin/lcdstat process to minimize the risk of exploitation.

Exploit

Fix

DoS

Divide By Zero

Weakness Enumeration

CWE-369

Related Identifiers

CVE-2020-20253

Affected Products

Mikrotik Routeros

Routeros

References · 5

• 🔥 https://github.com/cq674350529/pocs_slides/blob/master/pocs/MikroTik/vul_lcdstat_4/README.md · Exploit
• 🔥 http://seclists.org/fulldisclosure/2021/May/14 · Exploit
• https://osv.dev/vulnerability/CVE-2020-20253 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-20253 · Security Note
• https://t.me/cvenotify/14981 · Telegram Post