A service console interface on openPDC and openHistorian deserializes a client-supplied data structure. On systems using Windows Authentication, an attacker must already be authenticated to reach this function; on systems without Windows Authentication, this is reachable by an unauthenticated network attacker. This allows an attacker to trigger deserialization of an arbitrary object graph, which could allow remote code execution under the privileges of the affected service account.
Grid Protection Alliance does not recommend production use of published Docker images in any case. The fix for this vulnerability has not been published to the Docker image.
Grid Protection Alliance has added additional validation into serialization logic in openPDC version 2.9.482 and later and openHistorian version 2.8.585 and later. Systems using Windows Authentication are additionally protected, as they require the attacker to already be authenticated to reach this function.