ET EXPLOIT Possible TLS HeartBleed Unencrypted Request Method 4 (Inbound to Common SSL Port)

Query · suricata

flow:established,to_server;
content:"|18 03|";
byte_test:1,<,4,0,relative;
content:"|00 03 01|"; distance:1; within:3;
byte_test:2,>,150,0,relative;
isdataat:!18,relative;
threshold:type limit,track by_src,count 1,seconds 120;
Raw source ET EXPLOIT Possible TLS HeartBleed Unencrypted Request Method 4 (Inbound to Common SSL Port) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp any any -> $HOME_NET [443,636,989,990,992,993,994,995,5061,25] (
    msg:"ET EXPLOIT Possible TLS HeartBleed Unencrypted Request Method 4 (Inbound to Common SSL Port)";
    flow:established,to_server;
    content:"|18 03|";
    byte_test:1,<,4,0,relative;
    content:"|00 03 01|"; distance:1; within:3;
    byte_test:2,>,150,0,relative;
    isdataat:!18,relative;
    threshold:type limit,track by_src,count 1,seconds 120;
    reference:cve,2014-0160;
    reference:url,blog.inliniac.net/2014/04/08/detecting-openssl-heartbleed-with-suricata/;
    reference:url,heartbleed.com/;
    reference:url,blog.fox-it.com/2014/04/08/openssl-heartbleed-bug-live-blog/;
    classtype:bad-unknown;
    sid:2018388; rev:3;
    metadata:created_at 2014_04_15, cve CVE_2014_0160, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_16;
)

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