CVE-2020-20264 : Exploit Details and Defense Strategies
Learn about CVE-2020-20264, a vulnerability in Mikrotik RouterOs before 6.47 that allows an authenticated remote attacker to cause a Denial of Service by triggering a divide by zero error. Find out how to mitigate and prevent this security issue.
Mikrotik RouterOs before 6.47 (stable tree) in the /ram/pckg/advanced-tools/nova/bin/netwatch process. An authenticated remote attacker can cause a Denial of Service due to a divide by zero error.
Understanding CVE-2020-20264
This CVE involves a vulnerability in Mikrotik RouterOs that allows an authenticated remote attacker to trigger a Denial of Service (DoS) attack.
What is CVE-2020-20264?
CVE-2020-20264 is a security vulnerability in Mikrotik RouterOs versions prior to 6.47 that resides in the /ram/pckg/advanced-tools/nova/bin/netwatch process. The flaw enables an authenticated remote attacker to exploit a divide by zero error, leading to a DoS condition.
The Impact of CVE-2020-20264
The impact of this vulnerability is the potential for a remote attacker to disrupt services by causing a DoS condition on affected systems.
Technical Details of CVE-2020-20264
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability in Mikrotik RouterOs before version 6.47 allows an authenticated remote attacker to trigger a divide by zero error in the /ram/pckg/advanced-tools/nova/bin/netwatch process, resulting in a Denial of Service.
Affected Systems and Versions
- Affected System: Mikrotik RouterOs before version 6.47
- Affected Component: /ram/pckg/advanced-tools/nova/bin/netwatch process
- Authentication: Authenticated remote attacker
Exploitation Mechanism
The exploitation of this vulnerability involves an authenticated remote attacker triggering a divide by zero error in the specified process, leading to a DoS condition.
Mitigation and Prevention
Protecting systems from CVE-2020-20264 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update Mikrotik RouterOs to version 6.47 or later to mitigate the vulnerability.
- Monitor network traffic for any suspicious activity that could indicate an ongoing attack.
Long-Term Security Practices
- Regularly update and patch all software and firmware to prevent known vulnerabilities.
- Implement strong authentication mechanisms to limit unauthorized access to critical systems.
Patching and Updates
- Apply security patches provided by Mikrotik promptly to address the vulnerability and enhance system security.