CVE-2024-39879 in TeamCity
Summary
by MITRE • 07/01/2024
In JetBrains TeamCity before 2024.03.3 application token could be exposed in EC2 Cloud Profile settings
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Analysis
by VulDB Data Team • 09/17/2024
The vulnerability identified as CVE-2024-39879 affects JetBrains TeamCity versions prior to 2024.03.3 and relates to improper handling of application tokens within EC2 Cloud Profile settings. This issue represents a critical security flaw that could potentially allow unauthorized access to sensitive authentication credentials. The vulnerability occurs when application tokens are inadvertently exposed during the configuration process of EC2 cloud profiles, creating a significant risk for organizations relying on cloud infrastructure for their continuous integration and deployment workflows.
The technical flaw stems from insufficient input validation and output sanitization within the TeamCity administrative interface when processing EC2 cloud profile configurations. When administrators configure cloud profiles for Amazon EC2 integration, the application token used for authentication is stored in a manner that does not adequately protect it from being displayed or logged in plain text. This behavior violates fundamental security principles for credential handling and exposes sensitive authentication data that should remain confidential. The vulnerability is classified under CWE-200 as exposure of sensitive information and aligns with CWE-522 which addresses insufficiently protected credentials. The flaw essentially creates a credential exposure scenario where tokens intended for secure cloud operations become accessible through the application's configuration interface.
The operational impact of this vulnerability extends beyond simple credential leakage to encompass potential compromise of entire cloud infrastructure environments. Attackers who can access the TeamCity administrative interface or gain unauthorized access to the application's configuration data could extract application tokens and use them to authenticate against AWS services, potentially gaining unauthorized access to cloud resources, data, and computing instances. This exposure could lead to unauthorized resource consumption, data breaches, and potential lateral movement within cloud environments. The vulnerability directly maps to ATT&CK technique T1552.001 for credentials in files and T1078.004 for valid accounts, as it involves the exploitation of legitimate authentication tokens through improper configuration management. Organizations using TeamCity for CI/CD operations face heightened risk of supply chain attacks or cloud-based breaches when this vulnerability remains unpatched.
Mitigation strategies for CVE-2024-39879 primarily involve immediate deployment of JetBrains TeamCity version 2024.03.3 or later, which includes proper token sanitization and secure handling mechanisms. Organizations should conduct comprehensive audits of their EC2 cloud profile configurations to identify and remove any exposed tokens, followed by regeneration of all affected authentication credentials. Network segmentation and access controls should be implemented to limit administrative access to TeamCity environments, reducing the attack surface for potential exploitation. Additionally, organizations should implement monitoring solutions to detect unusual access patterns or credential usage that could indicate exploitation attempts. Regular security assessments of CI/CD environments and configuration management practices should be conducted to prevent similar vulnerabilities from emerging in other components of the software supply chain. The fix implemented by JetBrains addresses the root cause by ensuring that sensitive tokens are properly masked and sanitized during display operations within the application interface, thereby preventing unauthorized disclosure through configuration management interfaces.