CVE-2023-40044

Name of the Vulnerable Software and Affected Versions WS FTP Server versions prior to 8.7.4 and 8.8.2

Description The issue is related to a .NET deserialization vulnerability in the Ad Hoc Transfer module of WS FTP Server. This vulnerability can be exploited by a pre-authenticated attacker to execute remote commands on the underlying WS FTP Server operating system. The vulnerability has been observed being actively exploited in the wild, and it is estimated that a significant number of devices may be affected.

Recommendations For WS FTP Server versions prior to 8.7.4, update to version 8.7.4 or later. For WS FTP Server versions prior to 8.8.2, update to version 8.8.2 or later. As a temporary workaround, consider disabling the Ad Hoc Transfer module until a patch is available.