ET WEB_SPECIFIC_APPS Roundcube Webmail XSS Attempt (CVE-2023-5631)

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
file.data;
content:"<html>";
content:"<svg><use href=|22|data:image/";
pcre:"/<svg><use href=|22|data:image\/s[ \t\n]{1,}vg\+xml|2b|base64,/Ri";
content:"|3b|base64"; distance:0;
content:"</html>"; distance:0;
Raw source ET WEB_SPECIFIC_APPS Roundcube Webmail XSS Attempt (CVE-2023-5631) · 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 WEB_SPECIFIC_APPS Roundcube Webmail XSS Attempt (CVE-2023-5631)";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    file.data;
    content:"<html>";
    content:"<svg><use href=|22|data:image/";
    pcre:"/<svg><use href=|22|data:image\/s[ \t\n]{1,}vg\+xml|2b|base64,/Ri";
    content:"|3b|base64"; distance:0;
    content:"</html>"; distance:0;
    reference:url,roundcube.net/news/2023/10/16/security-update-1.6.4-released;
    reference:url,roundcube.net/news/2023/10/16/security-updates-1.5.5-and-1.4.15;
    reference:cve,2023-5631;
    classtype:attempted-user;
    sid:2049139; rev:1;
    metadata:affected_product Roundcube, attack_target Client_Endpoint, created_at 2023_11_08, cve CVE_2023_5631, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag XSS, tag CISA_KEV, updated_at 2023_11_08;
)

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