Advantech WebAccess gChkUser ChkAdminViewUsrPwd SQL Injection Authentication Bypass Vulnerability

This vulnerability allows remote attackers to bypass authentication on vulnerable installations of Advantech WebAccess. The specific flaw exists within the ChkAdminViewUsrPwd method of the gChkUser.asp servlet, called by the gmap.asp servlet. When parsing the user and proj parameters, the process does not properly validate user-supplied strings before using them to construct SQL queries. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the database.