CVE-2024-27199 in TeamCity
Summary
by MITRE • 03/04/2024
In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possible
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Analysis
by VulDB Data Team • 04/21/2026
The vulnerability identified as CVE-2024-27199 represents a path traversal flaw in JetBrains TeamCity versions prior to 2023.11.4 that enables unauthorized users to perform limited administrative actions through improper input validation. This vulnerability falls under the category of directory traversal attacks where malicious actors can manipulate file paths to access restricted system resources. The flaw specifically affects the application's handling of user-supplied paths during file operations, allowing attackers to bypass normal access controls and potentially escalate their privileges within the TeamCity environment.
The technical implementation of this vulnerability stems from insufficient validation of file path parameters within the TeamCity application's file handling mechanisms. When users submit requests containing specially crafted path references, the system fails to properly sanitize or validate these inputs before processing them. This weakness enables attackers to traverse directory structures and access files or directories that should normally be restricted to administrators. The vulnerability is particularly concerning because it allows for limited administrative actions, meaning that while full system compromise may not be immediately possible, attackers can still perform significant operations that could lead to further exploitation or data compromise. The path traversal occurs at the application level where file system operations are executed without adequate boundary checking or canonicalization of user-provided paths.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with the ability to manipulate critical TeamCity functions and potentially access sensitive configuration files, build artifacts, or system resources. Organizations using affected TeamCity versions face risks including unauthorized modification of build configurations, access to confidential project information, and potential disruption of continuous integration processes. The limited administrative capabilities available through this vulnerability mean that attackers can perform operations such as modifying build scripts, accessing credentials stored in configuration files, or altering project settings that could affect the integrity of the entire CI/CD pipeline. This type of vulnerability directly impacts the principle of least privilege and can undermine the security posture of development environments where TeamCity serves as a central orchestration platform for software delivery processes.
Organizations should prioritize immediate patching of affected TeamCity installations to version 2023.11.4 or later, which contains the necessary fixes for the path traversal vulnerability. The mitigation strategy should include comprehensive testing of the patched environment to ensure no regression in functionality while also implementing additional monitoring for suspicious file access patterns. Security teams should review access controls and permissions within their TeamCity instances to minimize the potential impact of any remaining vulnerabilities. The vulnerability aligns with CWE-22 Path Traversal and follows attack patterns documented in the ATT&CK framework under privilege escalation techniques. Organizations should also consider implementing web application firewalls and input validation controls as additional defensive measures, while conducting regular security assessments of their CI/CD environments to identify similar vulnerabilities that could compromise the integrity of their software development lifecycle processes.