Medium severity · published May 18, 2021
CVE-2020-20253
Mikrotik RouterOs before 6.47 (stable tree) suffers from a divison by zero vulnerability in the /nova/bin/lcdstat process
6.5
CVSS
2.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.1% · higher than 82% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RO
Routeros · Mikrotik
before 6.47 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-20253
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-20253
Exploit
http://seclists.org/fulldisclosure/2021/May/14
Broken Link
https://github.com/cq674350529/pocs_slides/blob/master/pocs/MikroTik/vul_lcdstat_4/README.md
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