ET EXPLOIT Possible OpenSSL Punycode Email Address Buffer Overflow Attempt Inbound (CVE-2022-3602)

Query · suricata

flow:established,to_client;
tls.certs;
content:"|06 03 55 1d 1e|";
content:"xn--"; fast_pattern; within:30;
byte_test:2,>,513,-6,relative;
Raw source ET EXPLOIT Possible OpenSSL Punycode Email Address Buffer Overflow Attempt Inbound (CVE-2022-3602) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tls $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET EXPLOIT Possible OpenSSL Punycode Email Address Buffer Overflow Attempt Inbound (CVE-2022-3602)";
    flow:established,to_client;
    tls.certs;
    content:"|06 03 55 1d 1e|";
    content:"xn--"; fast_pattern; within:30;
    byte_test:2,>,513,-6,relative;
    reference:url,www.openssl.org/news/secadv/20221101.txt;
    reference:cve,2022-3602;
    classtype:attempted-admin;
    sid:2039618; rev:1;
    metadata:attack_target Server, created_at 2022_11_01, cve CVE_2022_3602, deployment Perimeter, performance_impact Significant, confidence Low, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_11_02;
)

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