Rule History

alert tcp-pkt any any -> $HOME_NET 9530 (msg:"ET EXPLOIT Xiongmai/HiSilicon DVR - OpenTelnet Inbound - Possilbe CVE-2020-22253 Attempt"; flow:established,to_server; stream_size:server,<,5; flowbits:set,ET.CVE-2020-22253; flowbits:noalert; dsize:20; content:"|13|OpenTelnet:OpenOnce"; reference:url,habr.com/en/post/486856/; reference:url,vulncheck.com/blog/xiongmai-iot-exploitation; reference:url,github.com/tothi/hs-dvr-telnet; reference:cve,2020-22253; classtype:attempted-recon; sid:2041646; rev:1; metadata:attack_target IoT, created_at 2022_12_02, cve CVE_2020_22253, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_02;)