[+] Credits: John Page (aka hyp3rlinx) [+] Website: hyp3rlinx.altervista.org [+] Source: https://hyp3rlinx.altervista.org/advisories/WYRESTORM_APOLLO_VX20_ACCOUNT_ENUMERATION_CVE-2024-25734.txt [+] twitter.com/hyp3rlinx [+] ISR: ApparitionSec [Vendor] www.wyrestorm.com [Product] APOLLO VX20 < 1.3.58 [Vulnerability Type] Account Enumeration [CVE Reference] CVE-2024-25734 [Security Issue] An issue was discovered on WyreStorm Apollo VX20 devices before 1.3.58. The TELNET service prompts for a password only after a valid username is entered. Attackers who can reach the Apollo VX20 Telnet service can determine valid accounts, this can potentially allow for brute force attack on a valid account. [Exploit/POC] TELNET x.x.x.x 23 username:aa username:bb username:admin password: [Network Access] Remote [Affected Product Code Base] APOLLO VX20 - < 1.3.58, fixed in v1.3.58 [Severity] Medium [Disclosure Timeline] Vendor Notification: January 18, 2024 Vendor released fixed firmware v1.3.58: February 2, 2024 February 11, 2024 : Public Disclosure [+] 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. All content (c). hyp3rlinx