Versions (2)
Version DetailsCurrent
Rev: 2 • Feb 24, 2025, 12:00 PMET EXPLOIT Zyxel runCommandInShell Telnet Service Command Injection Attempt (CVE-2024-40891)
alert tcp any any -> $HOME_NET 23 (msg:"ET EXPLOIT Zyxel runCommandInShell Telnet Service Command Injection Attempt (CVE-2024-40891)"; flow:established,to_server; pcre:"/^.*(?:cat|ifconfig|ping|ps|pwd|tftp|wlctl).*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24)|(?:\x26|%26))*?sh/"; content:"sh"; fast_pattern; reference:cve,2024-40891; reference:url,vulncheck.com/blog/zyxel-telnet-vulns; classtype:attempted-admin; sid:2060323; rev:2; metadata:affected_product Zyxel, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_02_24, cve CVE_2024_40891, deployment Perimeter, deployment Internal, performance_impact Moderate, confidence Medium, signature_severity Major, tag Exploit, tag CISA_KEV, updated_at 2025_03_03, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
Feb 24, 2025, 12:00 PM
Mar 3, 2025, 12:00 PM
Feb 25, 2025, 5:11 AM
May 30, 2025, 12:04 AM
rules/emerging-exploit.rules