CVE-2020-28641

In Malwarebytes Free 4.1.0.56, a symbolic link may be used delete an arbitrary file on the system by exploiting the local quarantine system.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Potential Mitigations

• Follow the principle of least privilege when assigning access rights to entities in a software system.
• Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/132.html
• https://cwe.mitre.org/data/definitions/17.html
• https://cwe.mitre.org/data/definitions/35.html
• https://cwe.mitre.org/data/definitions/76.html

References

• https://support.malwarebytes.com/hc/en-us/articles/1500000403501-Arbitrary-file-deletion-vulnerability-fixed-in-Malwarebytes-Endpoint-Protection
• https://support.malwarebytes.com/hc/en-us/articles/360058885974-Arbitrary-file-deletion-vulnerability-fixed-in-Malwarebytes-for-Windows
• https://www.malwarebytes.com