CVE-2024-41829 in TeamCity
Summary
by MITRE • 07/22/2024
In JetBrains TeamCity before 2024.07 an OAuth code for JetBrains Space could be stolen via Space Application connection
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Analysis
by VulDB Data Team • 03/17/2025
The vulnerability identified as CVE-2024-41829 represents a critical security flaw in JetBrains TeamCity versions prior to 2024.07 that affects the OAuth authentication mechanism used for connecting to JetBrains Space applications. This vulnerability specifically targets the authorization code flow implementation within the TeamCity platform, creating an opportunity for malicious actors to intercept and steal OAuth authorization codes during the authentication process. The flaw exists in how TeamCity handles the OAuth callback mechanism when establishing connections with JetBrains Space, potentially allowing attackers to gain unauthorized access to user sessions and credentials.
The technical implementation of this vulnerability stems from insufficient validation and secure handling of OAuth authorization codes within the TeamCity application. When users attempt to connect their TeamCity instances to JetBrains Space through OAuth authentication, the system generates an authorization code that should be securely transmitted and immediately consumed by the application. However, the vulnerable implementation fails to properly validate the callback URL or implement adequate security measures to prevent interception of this code. This weakness creates a path for attackers to potentially capture the authorization code and use it to impersonate legitimate users within the JetBrains Space environment, effectively bypassing normal authentication controls.
The operational impact of this vulnerability extends beyond simple credential theft, as successful exploitation could enable attackers to access sensitive project data, modify build configurations, and potentially gain elevated privileges within the TeamCity environment. The stolen OAuth codes could be used to establish unauthorized connections to JetBrains Space services, allowing attackers to access private repositories, view confidential build artifacts, and manipulate continuous integration pipelines. This vulnerability particularly affects organizations that rely heavily on TeamCity for their development workflows and use JetBrains Space for collaboration, as it undermines the integrity of the entire authentication ecosystem between these platforms.
Organizations should immediately upgrade to TeamCity version 2024.07 or later to remediate this vulnerability, as this release includes enhanced OAuth code handling and validation mechanisms. Additional mitigations include implementing strict callback URL validation, enabling secure transport protocols such as TLS 1.3, and monitoring for unusual authentication patterns that might indicate code interception attempts. Security teams should also review existing TeamCity configurations to ensure that OAuth connections are properly secured and that appropriate network segmentation is in place to limit potential attack surface. This vulnerability aligns with CWE-346 known as "Improper Verification of Source of a Communication Channel" and could be leveraged as part of broader attack chains targeting CI/CD environments, potentially mapping to ATT&CK technique T1566.002 for credential access through phishing and social engineering approaches that exploit the authentication flow weaknesses.