ISN generation vulnerabilities found in nine of eleven TCP/IP stacks, says Forescout Research Labs

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Forescout researchers have discovered vulnerabilities in multiple TCP/IP stacks in which ISNs (Initial Sequence Numbers within TCP connections) are improperly generated. This is leaving devices’ TCP connections open to attacks. In a recent assessment, Forescout researchers analysed 11 total stacks: uIP, FNET, picoTCP, Nut/Net, lwIP, cycloneTCP, uC/TCP-IP, MPLAB Net, TI-NDKTCPIP, Nanostack, and Nucleus NET. Improperly

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