CVE-2020-20250: mikrotik routeros NULL Pointer Dereference

Vulnerability summary

CVE-2020-20250 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in mikrotik routeros. EPSS estimates a 1.71% chance of exploitation in the next 30 days, higher than 77.1% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 13-07-2021
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

Mikrotik RouterOs before stable version 6.47 suffers from a memory corruption vulnerability in the /nova/bin/lcdstat process. An authenticated remote attacker can cause a Denial of Service (NULL pointer dereference). NOTE: this is different from CVE-2020-20253 and CVE-2020-20254. All four vulnerabilities in the /nova/bin/lcdstat process are discussed in the CVE-2020-20250 github.com/cq674350529 reference.

• CWE-476NULL Pointer DereferenceThe product dereferences a pointer that it expects to be valid but is NULL.
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.