PI Server in OSIsoft PI System before 3.4.380.x does not properly use encryption in the default authentication process, which allows remote attackers to read or modify information in databases via unspecified vectors.

The TCP implementation in (1) Linux, (2) platforms based on BSD Unix, (3) Microsoft Windows, (4) Cisco products, and probably other operating systems allows remote attackers to cause a denial of service (connection queue exhaustion) via multiple vectors that manipulate information in the TCP state table, as demonstrated by sockstress.