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CVE-2023-42819 is a directory traversal vulnerability in JumpServer's Job-Template playbook file handling. An authenticated user can create a playbook and manipulate the file-selection key with relative path traversal sequences to access files outside the intended playbook directory. A similar flaw permits modification of file contents.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides two exploit implementations (in Go and Python) for CVE-2023-42819, an arbitrary file write vulnerability in JumpServer. Both scripts automate the exploitation process, which involves authenticating to the target JumpServer instance (using valid credentials), leveraging browser automation (via Selenium and ChromeDriver) to obtain session cookies, and then using those cookies to interact with JumpServer's API endpoints. The exploit chain creates a new playbook, writes a malicious file (reverse shell payload) to the server, and triggers its execution, resulting in a reverse shell connection to the attacker's machine. The repository includes a README with detailed usage instructions, requirements (such as Chrome and chromedriver), and build/run steps for both versions. The main attack vector is network-based, targeting the JumpServer web interface and API. Several fingerprintable endpoints are used, including login and playbook management APIs. The exploit is operational, requiring some setup but providing a working reverse shell if successful.
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