Description
An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a user enumeration vulnerability, allowing an unauthenticated attacker to determine with certainty if an account exists for a given username.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- ConnectWise Control 19.2.24707 - Username Enumeration EDB-50618 · remote · Jan 5, 2022
GitHub 1 repository
-
czz/ScreenConnect-UserEnum ★ 0 · Dec 17, 2021
ConnectWise also known as ScreenConnect CVE-2019-16516
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://know.bishopfox.com/advisories
- https://know.bishopfox.com/advisories/connectwise-control
- https://blog.huntresslabs.com/validating-the-bishop-fox-findings-in-connectwise-control-9155eec36a34
- https://www.crn.com/news/managed-services/connectwise-control-msp-security-vulnerabilities-are-severe-bishop-fox
- https://www.crn.com/slide-shows/managed-services/connectwise-control-attack-chain-exploit-20-questions-for-security-researcher-bishop-fox
- http://packetstormsecurity.com/files/165432/ConnectWise-Control-19.2.24707-Username-Enumeration.html