ET EXPLOIT Potentially Malicious .cab Inbound (CVE-2020-1300)

Query · suricata

flow:established,from_server;
http.stat_code;
content:"200";
http.response_body;
content:"MSCF"; startswith;
content:"../../"; distance:0; fast_pattern;
pcre:"/^[a-z0-9\-_\.\/]+\x00/Ri";
Raw source ET EXPLOIT Potentially Malicious .cab Inbound (CVE-2020-1300) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET EXPLOIT Potentially Malicious .cab Inbound (CVE-2020-1300)";
    flow:established,from_server;
    http.stat_code;
    content:"200";
    http.response_body;
    content:"MSCF"; startswith;
    content:"../../"; distance:0; fast_pattern;
    pcre:"/^[a-z0-9\-_\.\/]+\x00/Ri";
    reference:url,www.thezdi.com/blog/2020/7/8/cve-2020-1300-remote-code-execution-through-microsoft-windows-cab-files;
    classtype:attempted-admin;
    sid:2030493; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2020_07_10, cve CVE_2020_1300, deployment Perimeter, deployment Datacenter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_07_10;
)

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.