ConnectWise ScreenConnect auth bypass mass-exploited

Updates on Feb 22, 2024

Summary

ConnectWise ScreenConnect before 23.9.8 had a trivially exploitable authentication bypass (CVE-2024-1709, CVSS 10) and a path traversal (CVE-2024-1708), reported to ConnectWise on 2024-02-19. Attackers could create an admin account on self-hosted servers and then push code to every managed endpoint. Exploitation began within days, including by ransomware groups. Cloud instances were patched by ConnectWise; on-premise servers had to update to 23.9.8. Added to the CISA KEV catalog on 2024-02-22. CISA lists known use in ransomware campaigns.

Advisories4

• ConnectWise ScreenConnect 23.9.8 security bulletinConnectWise · Feb 19, 2024
• NVD: CVE-2024-1709NVD · Feb 21, 2024
• NVD: CVE-2024-1708NVD · Feb 21, 2024
• CISA Known Exploited Vulnerabilities CatalogCISA · Feb 22, 2024