ET EXPLOIT Possible OpenSSL HeartBleed Large HeartBeat Response (Client Init Vuln Server)

Query · suricata

flow:established,to_client;
content:"|18 03|"; depth:2;
byte_test:1,<,4,2;
flowbits:isset,ET.HB.Request.CI;
flowbits:isnotset,ET.HB.Response.CI;
flowbits:set,ET.HB.Response.CI;
flowbits:unset,ET.HB.Request.CI;
byte_test:2,>,150,3;
threshold:type limit,track by_src,count 1,seconds 120;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Excludes

  • ET.HB.Response.CI — excluded, not a dependency

Feeds into

  • 1 rule read ET.HB.Response.CI · view all
Raw source ET EXPLOIT Possible OpenSSL HeartBleed Large HeartBeat Response (Client Init Vuln Server) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET any -> any any (
    msg:"ET EXPLOIT Possible OpenSSL HeartBleed Large HeartBeat Response (Client Init Vuln Server)";
    flow:established,to_client;
    content:"|18 03|"; depth:2;
    byte_test:1,<,4,2;
    flowbits:isset,ET.HB.Request.CI;
    flowbits:isnotset,ET.HB.Response.CI;
    flowbits:set,ET.HB.Response.CI;
    flowbits:unset,ET.HB.Request.CI;
    byte_test:2,>,150,3;
    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:2018377; rev:4;
    metadata:created_at 2014_04_09, cve CVE_2014_0160, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_16;
)

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