ET WEB_SPECIFIC_APPS JetBrains TeamCity Authentication Bypass Attempt (CVE-2024-27198) - Admin User Creation Attempt
Sourceet/open
CreatedMarch 6, 2024
UpdatedAugust 11, 2025
Classificationattempted-admin
alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS JetBrains TeamCity Authentication Bypass Attempt (CVE-2024-27198) - Admin User Creation Attempt"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"jsp|3d|/app/rest/users"; fast_pattern; content:".jsp"; within:30; http.request_body; content:"|7b|"; startswith; content:"|22|username|22 3a 20 22|"; content:"|22|password|22 3a 20 22|"; content:"|5b 7b 22|roleId|22 3a 20 22|SYSTEM_ADMIN"; reference:cve,2024-27198; reference:url,www.rapid7.com/blog/post/2024/03/04/etr-cve-2024-27198-and-cve-2024-27199-jetbrains-teamcity-multiple-authentication-bypass-vulnerabilities-fixed/; classtype:attempted-admin; sid:2051506; rev:5; metadata:affected_product JetBrains_TeamCity, created_at 2024_03_06, cve CVE_2024_27198, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag JetBrains_TeamCity, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_08_11, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
References
Metadata
affected productJetBrains_TeamCity
created at2024_03_06
deploymentSSLDecrypt
confidenceHigh
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2025_08_11
mitre tactic idTA0001
mitre tactic nameInitial_Access
mitre technique idT1190
mitre technique nameExploit_Public_Facing_Application
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