ET EXPLOIT Possible CVE-2015-7547 Malformed Server Response A/AAAA

Query · suricata

flow:from_server;
content:"|00 01 00 00 00 00 00 00|"; offset:4; depth:10;
isdataat:2049;
byte_test:1,&,128,2;
byte_test:1,!&,64,2;
byte_test:1,!&,32,2;
byte_test:1,!&,16,2;
byte_test:1,!&,8,2;
byte_test:1,&,2,2;
byte_test:1,!&,1,3;
byte_test:1,!&,2,3;
byte_test:1,!&,4,3;
byte_test:1,!&,8,3;
pcre:"/^(?:.[a-z0-9-]{2,}){2,}\x00\x00(?:\x01|\x1c)/Ri";
Raw source ET EXPLOIT Possible CVE-2015-7547 Malformed Server Response A/AAAA · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert udp any 53 -> $HOME_NET any (
    msg:"ET EXPLOIT Possible CVE-2015-7547 Malformed Server Response A/AAAA";
    flow:from_server;
    content:"|00 01 00 00 00 00 00 00|"; offset:4; depth:10;
    isdataat:2049;
    byte_test:1,&,128,2;
    byte_test:1,!&,64,2;
    byte_test:1,!&,32,2;
    byte_test:1,!&,16,2;
    byte_test:1,!&,8,2;
    byte_test:1,&,2,2;
    byte_test:1,!&,1,3;
    byte_test:1,!&,2,3;
    byte_test:1,!&,4,3;
    byte_test:1,!&,8,3;
    pcre:"/^(?:.[a-z0-9-]{2,}){2,}\x00\x00(?:\x01|\x1c)/Ri";
    reference:cve,2015-7547;
    classtype:attempted-user;
    sid:2022545; rev:1;
    metadata:created_at 2016_02_18, cve CVE_2015_7547, confidence Medium, signature_severity Major, updated_at 2019_07_26;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.