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Saint INFRA:HALT, Who Stopped the Factories
Patron of embedded TCP/IP stacks, overlong DNS responses, and plants nobody dares to reboot.
Life
On 4 August 2021 Forescout and JFrog revealed fourteen vulnerabilities in NicheStack, a TCP/IP stack hidden in thousands of industrial devices. A well-crafted DNS response or a malicious HTTP request was enough to run code or freeze the device: hence the name, which is an order to stop. It belonged to Project Memoria, the long procession of bugs in network stacks.
Prayer
O Saint INFRA:HALT, who stops machinery with a single packet, let our PLCs read every DNS response to the last byte and no further. Amen.
How to celebrate
Celebrated by upgrading NicheStack to 4.3 and segmenting the OT network, ideally before the next plant shutdown.
Wrong packet, stopped line.