Affected: Siemens SIDOOR ATD430W, Siemens SIDOOR ATE530G COATED, Siemens SIDOOR ATE530S COATED, Siemens SIMATIC CFU DIQ, Siemens SIMATIC CFU PA, Siemens SIMATIC ET 200AL IM 157-1 PN, Siemens SIMATIC ET 200M IM 153-4 PN IO HF, Siemens SIMATIC ET 200M IM 153-4 PN IO ST, Siemens SIMATIC ET 200MP IM 155-5 PN BA, Siemens SIMATIC ET 200MP IM 155-5 PN HF and 127 more

The integrated ICMP service of the network stack of affected devices can be forced to exhaust its available memory resources when receiving specially crafted messages targeting IP fragment re-assembly. This could allow an unauthenticated remote attacker to cause a temporary denial of service condition of the ICMP service, other communication services are not affected. Affected devices will resume normal operation after the attack terminates.