ET EXPLOIT JetBrains TeamCity Auth Bypass Attempt (CVE-2023-42793)

alert http any any -> [$HTTP_SERVERS,$HOME_NET] any (
    msg:"ET EXPLOIT JetBrains TeamCity Auth Bypass Attempt (CVE-2023-42793)";
    flow:established,to_server;
    flowbits:set,ET.CVE-2023-42793;
    http.method;
    content:"POST";
    http.uri;
    content:"/app/rest/users/id|3a|"; startswith; fast_pattern;
    content:"/tokens/";
    content:"/RPC2"; endswith;
    reference:url,www.sonarsource.com/blog/teamcity-vulnerability/;
    reference:url,blog.jetbrains.com/teamcity/2023/09/critical-security-issue-affecting-teamcity-on-premises-update-to-2023-05-4-now/;
    reference:url,attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793/rapid7-analysis;
    reference:cve,2023-42793;
    classtype:attempted-admin;
    sid:2048460; rev:1;
    metadata:affected_product JetBrains_TeamCity, attack_target Web_Server, created_at 2023_10_05, cve CVE_2023_42793, deployment Perimeter, deployment Internal, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Major, tag CISA_KEV, updated_at 2023_10_05;
    target:src_ip;
)