CVE-2024-1540
📋 TL;DR
A command injection vulnerability in the gradio-app/gradio repository's GitHub Actions workflow allows attackers to execute arbitrary commands by manipulating GitHub context variables. This affects organizations using vulnerable versions of the gradio repository with GitHub Actions enabled. Attackers could modify the repository or exfiltrate secrets.
💻 Affected Systems
- gradio-app/gradio
📦 What is this software?
Gradio by Gradio Project
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the repository, exfiltration of all secrets stored in GitHub Actions, and potential lateral movement to connected systems.
Likely Case
Unauthorized code modifications, secret exfiltration, and disruption of CI/CD pipelines.
If Mitigated
Limited impact with proper input validation and environment variable isolation.
🎯 Exploit Status
Exploitation requires write access to the repository or ability to trigger GitHub Actions workflows.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Commit d56bb28df80d8db1f33e4acf4f6b2c4f87cb8b28
Vendor Advisory: https://github.com/gradio-app/gradio/commit/d56bb28df80d8db1f33e4acf4f6b2c4f87cb8b28
Restart Required: No
Instructions:
1. Update to the latest gradio repository version. 2. Ensure the deploy+test-visual.yml workflow file includes the security fix. 3. Review and rotate any exposed secrets.
🔧 Temporary Workarounds
Disable vulnerable workflow
allTemporarily disable the deploy+test-visual.yml GitHub Actions workflow
Isolate untrusted inputs
allManually modify workflow to set GitHub context variables to intermediate environment variables
🧯 If You Can't Patch
- Disable GitHub Actions for the repository
- Implement strict access controls and monitor for suspicious workflow executions
🔍 How to Verify
Check if Vulnerable:
Check if deploy+test-visual.yml workflow contains direct use of ${{ github.event.* }} in run commands without intermediate variablesCheck Version:
git log --oneline | grep d56bb28Verify Fix Applied:
Verify the workflow uses environment variables for untrusted inputs (e.g., env: UNTRUSTED_INPUT: ${{ github.event.* }})📡 Detection & Monitoring
Log Indicators:
- Unexpected commands in GitHub Actions logs
- Workflow executions from unauthorized users
Network Indicators:
- Unusual outbound connections from GitHub Actions runners
SIEM Query:
source="github-actions" AND (command="*injection*" OR command="*malicious*" OR command="*unauthorized*")