ET EXPLOIT Possible CVE-2014-6271 exploit attempt via malicious DNS

Query · suricata

byte_test:1,&,128,4;
content:"|28 29 20 7b|"; fast_pattern;
Raw source ET EXPLOIT Possible CVE-2014-6271 exploit attempt via malicious DNS · 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 53 -> $HOME_NET any (
    msg:"ET EXPLOIT Possible CVE-2014-6271 exploit attempt via malicious DNS";
    byte_test:1,&,128,4;
    content:"|28 29 20 7b|"; fast_pattern;
    reference:cve,2014-6271;
    reference:url,packetstormsecurity.com/files/128650;
    classtype:attempted-admin;
    sid:2019403; rev:2;
    metadata:created_at 2014_10_15, cve CVE_2014_6271, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;
)

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