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CVE-2020-13166

Status Candidate

Overview

The management tool in MyLittleAdmin 3.8 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers' installations) in web.config, and can be used to send serialized ASP code.

Related Files

Plesk / myLittleAdmin ViewState .NET Deserialization
Posted May 22, 2020
Authored by Spencer McIntyre, wvu | Site metasploit.com

This Metasploit module exploits a ViewState .NET deserialization vulnerability in web-based MS SQL Server management tool myLittleAdmin, for version 3.8 and likely older versions, due to hardcoded machineKey parameters in the web.config file for ASP.NET. Popular web hosting control panel Plesk offers myLittleAdmin as an optional component that is selected automatically during "full" installation. This exploit caters to the Plesk target, though it should work fine against a standalone myLittleAdmin setup. Successful exploitation results in code execution as the user running myLittleAdmin, which is IUSRPLESK_sqladmin for Plesk and described as the "SQL Admin MSSQL anonymous account". Tested on the latest Plesk Obsidian with optional myLittleAdmin 3.8.

tags | exploit, web, code execution, asp
advisories | CVE-2020-13166
SHA-256 | 4124c84ac15efa5a91216b271b351c4f85f28724a0347ca062414a3d04b8a3b5
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