CVE-2020-20254 : Exploit Details and Defense Strategies

Mikrotik RouterOs before 6.47 (stable tree) has a memory corruption vulnerability in the /nova/bin/lcdstat process, allowing an authenticated remote attacker to trigger a Denial of Service (NULL pointer dereference).

Understanding CVE-2020-20254

This CVE involves a specific vulnerability in Mikrotik RouterOs that can be exploited by an authenticated remote attacker.

What is CVE-2020-20254?

The vulnerability in Mikrotik RouterOs before version 6.47 allows attackers to cause a Denial of Service by exploiting a memory corruption issue in the /nova/bin/lcdstat process.

The Impact of CVE-2020-20254

The exploitation of this vulnerability can lead to a Denial of Service condition, potentially disrupting the normal operation of affected systems.

Technical Details of CVE-2020-20254

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability in Mikrotik RouterOs before 6.47 involves a memory corruption issue in the /nova/bin/lcdstat process, which can be abused by authenticated remote attackers.

Affected Systems and Versions

Affected system: Mikrotik RouterOs before version 6.47
Affected component: /nova/bin/lcdstat process

Exploitation Mechanism

An authenticated remote attacker can exploit this vulnerability to trigger a Denial of Service by causing a NULL pointer dereference.

Mitigation and Prevention

Protecting systems from CVE-2020-20254 requires specific actions to mitigate the risk.

Immediate Steps to Take

Update Mikrotik RouterOs to version 6.47 or later to eliminate the vulnerability.
Implement strong authentication mechanisms to prevent unauthorized access.

Long-Term Security Practices

Regularly monitor security mailing lists and vendor announcements for updates and patches.
Conduct regular security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Apply security patches promptly to ensure that systems are protected against known vulnerabilities.