CVE-2024-4254 in Gradio
Summary
by MITRE • 06/04/2024
The 'deploy-website.yml' workflow in the gradio-app/gradio repository, specifically in the 'main' branch, is vulnerable to secrets exfiltration due to improper authorization. The vulnerability arises from the workflow's explicit checkout and execution of code from a fork, which is unsafe as it allows the running of untrusted code in an environment with access to push to the base repository and access secrets. This flaw could lead to the exfiltration of sensitive secrets such as GITHUB_TOKEN, HF_TOKEN, VERCEL_ORG_ID, VERCEL_PROJECT_ID, COMMENT_TOKEN, AWSACCESSKEYID, AWSSECRETKEY, and VERCEL_TOKEN. The vulnerability is present in the workflow file located at https://github.com/gradio-app/gradio/blob/72f4ca88ab569aae47941b3fb0609e57f2e13a27/.github/workflows/deploy-website.yml.
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Analysis
by VulDB Data Team • 03/26/2025
The vulnerability identified in CVE-2024-4254 represents a critical security flaw within the GitHub Actions workflow of the gradio-app/gradio repository, specifically targeting the deploy-website.yml file. This weakness stems from a fundamental design flaw in how the workflow handles code execution from external sources, creating an environment where untrusted code can be executed with elevated privileges. The vulnerability manifests when the workflow explicitly checks out and executes code from a forked repository, a practice that bypasses normal security boundaries and creates a dangerous attack surface. The workflow operates with access to sensitive repository secrets and permissions that should normally be restricted to trusted code paths, making it an attractive target for malicious actors seeking to exploit the trust relationship between the workflow and the repository's security infrastructure.
The technical implementation of this vulnerability directly violates several security principles and is categorized under CWE-829, which addresses the inclusion of untrusted data in a security decision. The workflow configuration allows for arbitrary code execution from untrusted sources while maintaining access to critical repository secrets, creating a scenario where an attacker could inject malicious code into a forked repository and then trigger its execution within the context of the main repository's workflow. This flaw is particularly dangerous because it operates at the intersection of supply chain security and privilege escalation, where the normal safeguards that protect against code injection are bypassed. The workflow's execution environment contains multiple high-value secrets including GITHUB_TOKEN for repository access, HF_TOKEN for Hugging Face API access, and various AWS credentials that could be leveraged for unauthorized access to cloud resources and data exfiltration.
The operational impact of this vulnerability extends beyond simple code execution to encompass comprehensive secret exfiltration and potential compromise of the entire repository infrastructure. Attackers could exploit this vulnerability to gain access to all secrets stored in the repository's GitHub Actions environment, including VERCEL_ORG_ID, VERCEL_PROJECT_ID, COMMENT_TOKEN, AWSACCESSKEYID, AWSSECRETKEY, and VERCEL_TOKEN. These secrets could enable attackers to deploy malicious code to production environments, access cloud resources, manipulate repository contents, and potentially use the stolen credentials for further attacks within the organization's infrastructure. The vulnerability creates a persistent threat vector that remains active as long as the workflow configuration allows code execution from untrusted sources, making it particularly concerning for open source projects where the security of the codebase depends on the integrity of third-party contributions and forked repositories.
Mitigation strategies for CVE-2024-4254 should focus on implementing strict code provenance controls and privilege separation within the workflow configuration. Organizations should adopt the principle of least privilege by ensuring that workflows executing code from forks or external sources do not have access to sensitive secrets or push permissions to the base repository. The recommended approach involves implementing code review processes, using trusted code sources, and configuring workflows to operate with minimal required permissions. Security controls should include disabling the checkout of external code in workflows that have access to secrets, implementing proper code signing verification, and utilizing GitHub's built-in security features such as secret scanning and protected branches. Additionally, implementing the ATT&CK framework's concept of privilege escalation prevention through workflow configuration can significantly reduce the attack surface. The workflow should be redesigned to avoid checking out code from untrusted sources or to implement proper isolation mechanisms that prevent sensitive operations from being executed in environments with compromised code integrity. Regular security audits of workflow configurations and adherence to security best practices for CI/CD pipelines are essential for preventing similar vulnerabilities in the future.