An issue was discovered in Contiki through 3.0. An infinite loop exists in the uIP TCP/IP stack component when processing IPv6 extension headers in ext_hdr_options_process in net/ipv6/uip6.c.Referenceshttps://www.kb.cert.org/vuls/id/815128https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01