ET EXPLOIT Microsoft Edge Chakra - InlineArrayPush Type Confusion Inbound M2 (CVE-2018-8617)

Query · suricata

flow:established,from_server;
file_data;
content:"function";
pcre:"/^\s*(?P<func_a>[\w\-]{1,20})\((?P<obj_1>[\w\-]{1,20})\s*,\s*(?P<obj_2>[\w\-]{1,20}).{1,300}(?P=obj_1)\.(?P<prop_2>[\w\-]{1,20})\s*=\s*\d+(?:\.\d+)?.{1,300}?(?P=obj_2)\.pop\(\).{1,300}?(?P=obj_1)\.(?P<prop_1>[\w\-]{1,20})\s*=\s*\d+(?:\.\d+)?.{1,500}Object\.prototype\.p(op|ush)\s*=\s*Array\.prototype\.p(op|ush)\x3b.{1,500}var\s*(?P<obj_3>[\w\-]{1,20})\s*=\s*\{\s*(?P=prop_1)\s*\x3a\s*\d+(?:\.\d+)?\s*,\s*(?:(?P=prop_2)\s*\x3a\s*\d+(?:\.\d+)?|(?P=prop_2)\s*\x3a\s*\d+(?:\.\d+)?\s*,\s*(?P=prop_1)\s*\x3a\s*\d+(?:\.\d+)).{1,500}(?P=func_a)\(\s*(?:(?P=obj_3)\s*,\s*new\s*Object\(\)|\s*new\s*Object\(\)\s*,\s*(?P=obj_3)\s*).{1,500}?(?P=func_a)\((?P=obj_3)/Rsi";
content:"Object.prototype.p";
content:"|20|=|20|Array.prototype.p"; fast_pattern;
Raw source ET EXPLOIT Microsoft Edge Chakra - InlineArrayPush Type Confusion Inbound M2 (CVE-2018-8617) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http any any -> $HOME_NET any (
    msg:"ET EXPLOIT Microsoft Edge Chakra - InlineArrayPush Type Confusion Inbound M2 (CVE-2018-8617)";
    flow:established,from_server;
    file_data;
    content:"function";
    pcre:"/^\s*(?P<func_a>[\w\-]{1,20})\((?P<obj_1>[\w\-]{1,20})\s*,\s*(?P<obj_2>[\w\-]{1,20}).{1,300}(?P=obj_1)\.(?P<prop_2>[\w\-]{1,20})\s*=\s*\d+(?:\.\d+)?.{1,300}?(?P=obj_2)\.pop\(\).{1,300}?(?P=obj_1)\.(?P<prop_1>[\w\-]{1,20})\s*=\s*\d+(?:\.\d+)?.{1,500}Object\.prototype\.p(op|ush)\s*=\s*Array\.prototype\.p(op|ush)\x3b.{1,500}var\s*(?P<obj_3>[\w\-]{1,20})\s*=\s*\{\s*(?P=prop_1)\s*\x3a\s*\d+(?:\.\d+)?\s*,\s*(?:(?P=prop_2)\s*\x3a\s*\d+(?:\.\d+)?|(?P=prop_2)\s*\x3a\s*\d+(?:\.\d+)?\s*,\s*(?P=prop_1)\s*\x3a\s*\d+(?:\.\d+)).{1,500}(?P=func_a)\(\s*(?:(?P=obj_3)\s*,\s*new\s*Object\(\)|\s*new\s*Object\(\)\s*,\s*(?P=obj_3)\s*).{1,500}?(?P=func_a)\((?P=obj_3)/Rsi";
    content:"Object.prototype.p";
    content:"|20|=|20|Array.prototype.p"; fast_pattern;
    reference:cve,2018-8617;
    classtype:attempted-admin;
    sid:2034004; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2021_09_21, cve CVE_2018_8617, deployment Perimeter, confidence Medium, signature_severity Major, tag Exploit, updated_at 2021_09_21;
)

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.