CVE-2020-36519 : Exploit Details and Defense Strategies
Learn about CVE-2020-36519, a vulnerability in Mimecast Email Security allowing admins to spoof domains and bypass DMARC alignment. Find mitigation steps and prevention measures here.
Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain, and pass DMARC alignment via SPF through misuse of the address rewrite feature.
Understanding CVE-2020-36519
This CVE highlights a vulnerability in Mimecast Email Security that enables admins to spoof domains and bypass DMARC alignment.
What is CVE-2020-36519?
The vulnerability in Mimecast Email Security allows any admin to spoof any domain and pass DMARC alignment via SPF by misusing the address rewrite feature. The spoofed domain must be a customer in the Mimecast grid.
The Impact of CVE-2020-36519
This vulnerability can lead to unauthorized spoofing of domains, potentially compromising email security and allowing malicious actors to impersonate legitimate senders.
Technical Details of CVE-2020-36519
This section provides more in-depth technical details of the CVE.
Vulnerability Description
The vulnerability in Mimecast Email Security before 2020-01-10 allows any admin to spoof any domain and pass DMARC alignment via SPF through the misuse of the address rewrite feature.
Affected Systems and Versions
- Product: Mimecast Email Security
- Vendor: Mimecast
- Versions affected: Mimecast Email Security before 2020-01-10
Exploitation Mechanism
The exploitation of this vulnerability involves admins misusing the address rewrite feature in Mimecast Email Security to spoof domains and pass DMARC alignment via SPF.
Mitigation and Prevention
Protecting systems from CVE-2020-36519 is crucial to maintaining email security.
Immediate Steps to Take
- Update Mimecast Email Security to versions released after 2020-01-10 to mitigate the vulnerability.
- Monitor email traffic for any suspicious activities related to domain spoofing.
Long-Term Security Practices
- Implement DMARC policies to prevent email spoofing and enhance email authentication.
- Educate administrators and users on email security best practices to prevent unauthorized access.
Patching and Updates
Regularly update Mimecast Email Security to the latest versions to ensure that known vulnerabilities are patched and security measures are up to date.