ET POLICY Potentially Vulnerable LibSSH Server Observed - Possible Authentication Bypass (CVE-2018-10933)

Query · suricata

flow:from_server,established;
content:"SSH-2.0-libssh-0."; depth:17;
pcre:"/^[67]\.[01235]/R";
target:dest_ip;
Raw source ET POLICY Potentially Vulnerable LibSSH Server Observed - Possible Authentication Bypass (CVE-2018-10933) · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET $SSH_PORTS -> any any (
    msg:"ET POLICY Potentially Vulnerable LibSSH Server Observed - Possible Authentication Bypass (CVE-2018-10933)";
    flow:from_server,established;
    content:"SSH-2.0-libssh-0."; depth:17;
    pcre:"/^[67]\.[01235]/R";
    reference:url,www.libssh.org/security/advisories/CVE-2018-10933.txt;
    reference:url,github.com/blacknbunny/libSSH-Authentication-Bypass;
    reference:cve,2018-10933;
    classtype:bad-unknown;
    sid:2026526; rev:1;
    metadata:created_at 2018_10_19, cve CVE_2018_10933, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag CVE_2018_10933, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)

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