SSA-362164 V1.2 (Last Update: 2022-11-08): Predictable Initial Sequence Numbers in the TCP/IP Stack of Nucleus RTOS

The networking component (Nucleus NET) in Nucleus Real-Time Operating System (RTOS) use Initial Sequence Numbers for TCP-Sessions that are predictable.

Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not available.

countermeasures ip stack latest networking nucleus numbers operating system products real rtos sessions siemens ssa stack system tcp update updates