SB2020052515 - Use of hard-coded credentials in MyLittleAdmin

Description

This security bulletin contains information about 1 security vulnerability.

1) Use of hard-coded credentials (CVE-ID: CVE-2020-13166)

The vulnerability allows a remote attacker to gain full access to vulnerable system.

The vulnerability exists due to presence of hard-coded "machineKey" in web.config. A remote unauthenticated attacker can serialize objects that will be parsed by the ASP code used by the server as if it were MyLittleAdmin’s serialized object and execute arbitrary code on the remote server.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• http://packetstormsecurity.com/files/157808/Plesk-myLittleAdmin-ViewState-.NET-Deserialization.html
• https://ssd-disclosure.com/ssd-advisory-mylittleadmin-preauth-rce/
• https://portswigger.net/daily-swig/mylittleadmin-has-a-big-unpatched-security-flaw