Improper authentication handling was identified in a set of HTTP POST requests affecting the following product families:

Digi PortServer TS - prior to and including 82000747AA, build date 06/17/2022

Digi One SP/Digi One SP IA/Digi One IA - prior to and including 82000774Z, build date 10/19/2020

Digi One IAP – prior to and including 82000770 Z, build date 10/19/2020

A specially crafted POST request to the device’s web interface may allow an unauthenticated attacker to modify configuration settings.

Digi RealPort Protocol is vulnerable to a replay attack that may allow an attacker to bypass authentication to access connected equipment.

In Digi RealPort through 4.10.490, authentication relies on a challenge-response mechanism that gives access to the server password, making the protection ineffective. An attacker may send an unauthenticated request to the server. The server will reply with a weakly-hashed version of the server's access password. The attacker may then crack this hash offline in order to successfully login to the server.