In CODESYS Gateway Server V2 an insufficient check for the activity of TCP client connections allows an unauthenticated attacker to consume all available TCP connections and prevent legitimate users or clients from establishing a new connection to the CODESYS Gateway Server V2. Existing connections are not affected and therefore remain intact.

An unauthenticated attacker would be able to send crafted requests to cause the CODESYS Gateway Server V2 to allocate excessive memory or consume all available TCP client connections. Besides, passwords are insufficiently checked during login.

All versions of the following CODESYS V2 product prior version V2.3.9.38 are affected:

• CODESYS Gateway Server

In CODESYS Gateway Server V2 an insufficient check for the activity of TCP client connections allows an unauthenticated attacker to consume all available TCP connections and prevent legitimate users or clients from establishing a new connection to the CODESYS Gateway Server V2. Existing connections are not affected and therefore remain intact.

An unauthenticated attacker would be able to send crafted requests to cause the CODESYS Gateway Server V2 to allocate excessive memory or consume all available TCP client connections. Besides, passwords are insufficiently checked during login.

All versions of the following CODESYS V2 product prior version V2.3.9.38 are affected:

• CODESYS Gateway Server

UPDATE A: Solution has updated release datesUPDATE B: Solution has updated release datesThis Advisory is published with reference to:

CODESYS Advisory 2022-11 (Security update for CODESYS Control V2) CODESYS Advisory 2022-12 (Security update for CODESYS V2 password transport) CODESYS Advisory 2022-13 (Security update for CODESYS Gateway V2)