CVE-2020-16875 : What You Need to Know
Learn about CVE-2020-16875, a remote code execution vulnerability in Microsoft Exchange Server 2019 CU5, CU6, 2016 CU16, and CU17. Find out how to mitigate and prevent this issue.
A remote code execution vulnerability in Microsoft Exchange Server 2019 CU5, CU6, 2016 CU16, and CU17 allows attackers to run arbitrary code in the context of the System user.
Understanding CVE-2020-16875
What is CVE-2020-16875?
A remote code execution vulnerability exists in Microsoft Exchange Server due to improper validation of cmdlet arguments. Successful exploitation allows running arbitrary code in the System user's context.
The Impact of CVE-2020-16875
Exploitation requires a compromised authenticated user in a specific Exchange role. The security update corrects how Exchange handles cmdlet arguments.
Technical Details of CVE-2020-16875
Vulnerability Description
The vulnerability allows remote code execution due to improper cmdlet argument validation in Microsoft Exchange Server.
Affected Systems and Versions
- Microsoft Exchange Server 2019 CU5, CU6
- Microsoft Exchange Server 2016 CU16, CU17
Exploitation Mechanism
- Attacker needs an authenticated user in a specific Exchange role
- Successful exploitation allows running arbitrary code
Mitigation and Prevention
Immediate Steps to Take
- Apply the security update provided by Microsoft
- Monitor for any unauthorized access or unusual activities
Long-Term Security Practices
- Regularly update and patch all software and systems
- Implement strong authentication mechanisms and access controls
Patching and Updates
- Install the latest cumulative updates and security patches from Microsoft