JetBrains TeamCity Authentication Bypass Suricata CVE-2024-27198
Description
The CVE-2024-27198 vulnerability presents a critical security risk for JetBrains TeamCity on-premises servers, allowing attackers to bypass authentication mechanisms and gain unauthorized access. This vulnerability can be exploited in several ways, each leading to the attacker gaining full control over the TeamCity server, including all associated projects, builds, agents, and artifacts. One method of exploitation involves creating a new administrator user. An attacker, without needing to authenticate, can send a specially crafted POST request to the /app/rest/users
REST API endpoint. This request includes the desired username, password, email, and roles for the new user, effectively granting them administrative privileges upon successful execution.Alternatively, an attacker can generate a new administrator access token by targeting the /app/rest/users/id:1/tokens
endpoint with a POST request. This method also does not require prior authentication and results in the creation of a token that grants administrative access. Both exploitation methods underscore the severity of the CVE-2024-27198 vulnerability and highlight the importance of securing TeamCity servers against such authentication bypass threats. The manipulation of URI paths /app/rest/users
and /app/rest/users/id:1/tokens
through malicious requests enables attackers to gain unauthorized access and control, emphasizing the need for immediate remediation measures.
- Type: TTP
-
Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Last Updated: 2024-03-04
- Author: Michael Haag, Splunk
- ID: fbcc04c7-8a79-453c-b3a9-c232c423bdd3
Annotations
Kill Chain Phase
- Delivery
NIST
- DE.CM
CIS20
- CIS 13
CVE
ID | Summary | CVSS |
---|---|---|
CVE-2024-27198 | In JetBrains TeamCity before 2023.11.4 authentication bypass allowing to perform admin actions was possible | None |
Search
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`suricata` ((http.url="*?jsp=*" AND http.url="*;.jsp*") http.status=200 http_method=POST) OR (http.url IN ("*jsp=/app/rest/users;.jsp","*?jsp=/app/rest/users;.jsp","*?jsp=.*/app/rest/users/id:*/tokens;*") http.status=200 http_method=POST )
| stats count min(_time) as firstTime max(_time) as lastTime by src, dest, http.http_user_agent, http.url, http.status,http_method
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `jetbrains_teamcity_authentication_bypass_suricata_cve_2024_27198_filter`
Macros
The SPL above uses the following Macros:
jetbrains_teamcity_authentication_bypass_suricata_cve-2024-27198_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
Required fields
List of fields required to use this analytic.
- src
- dest
- http.http_user_agent
- http.url
- http.status
- http_method
How To Implement
The following detection relies on the Suricata TA and ensuring it is properly configured to monitor HTTP traffic. Modify the query for your environment and log sources as needed.
Known False Positives
False positives are not expected, as this detection is based on the presence of specific URI paths and HTTP methods that are indicative of the CVE-2024-27198 vulnerability exploitation. Monitor, filter and tune as needed based on organization log sources.
Associated Analytic Story
RBA
Risk Score | Impact | Confidence | Message |
---|---|---|---|
81.0 | 90 | 90 | Possible JetBrains TeamCity Authentication Bypass Attempt against $dest$ from $src$. |
The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.
Reference
- https://github.com/projectdiscovery/nuclei-templates/pull/9279/files
- https://www.rapid7.com/blog/post/2024/03/04/etr-cve-2024-27198-and-cve-2024-27199-jetbrains-teamcity-multiple-authentication-bypass-vulnerabilities-fixed/
- https://blog.jetbrains.com/teamcity/2024/03/teamcity-2023-11-4-is-out/
- https://blog.jetbrains.com/teamcity/2024/03/additional-critical-security-issues-affecting-teamcity-on-premises-cve-2024-27198-and-cve-2024-27199-update-to-2023-11-4-now/
Test Dataset
Replay any dataset to Splunk Enterprise by using our replay.py
tool or the UI.
Alternatively you can replay a dataset into a Splunk Attack Range
source | version: 1