CVE-2024-41956
📋 TL;DR
This vulnerability allows authenticated users who can commit files to Soft Serve Git repositories to execute arbitrary code on the server. Attackers can manipulate environment variables passed to Git subprocesses, enabling remote code execution. Organizations running Soft Serve versions before 0.7.5 are affected.
💻 Affected Systems
- Soft Serve
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise allowing attackers to execute arbitrary commands with server privileges, potentially leading to data theft, lateral movement, or persistent backdoors.
Likely Case
Authenticated users with commit access can execute arbitrary code, potentially compromising the Soft Serve instance and accessing other repositories or system resources.
If Mitigated
With proper access controls limiting who can commit, impact is reduced to authorized users only, but still represents significant risk if any user turns malicious.
🎯 Exploit Status
Exploitation requires authenticated access with commit permissions. The vulnerability mechanism is well-understood (environment variable injection).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.7.5
Vendor Advisory: https://github.com/charmbracelet/soft-serve/security/advisories/GHSA-m445-w3xr-vp2f
Restart Required: Yes
Instructions:
1. Stop Soft Serve service. 2. Update to version 0.7.5 or later using your package manager or by downloading from GitHub. 3. Restart Soft Serve service.
🔧 Temporary Workarounds
Restrict environment variables
linuxConfigure Soft Serve to sanitize or block dangerous environment variables before passing to Git subprocesses
Requires code modification - not a simple command-line workaround
Implement strict access controls
allLimit commit permissions to trusted users only and implement repository-level access controls
Use Soft Serve's access control features to restrict permissions
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Soft Serve instances
- Enable detailed logging and monitoring for suspicious Git operations and environment variable usage
🔍 How to Verify
Check if Vulnerable:
Check Soft Serve version: if version < 0.7.5, system is vulnerableCheck Version:
soft-serve --versionVerify Fix Applied:
Verify Soft Serve version is 0.7.5 or higher and test that environment variables like LD_PRELOAD are not passed to Git📡 Detection & Monitoring
Log Indicators:
- Unusual Git operations from users
- Suspicious environment variables in process execution logs
- Failed attempts to set LD_PRELOAD or similar variables
Network Indicators:
- Unusual Git protocol traffic patterns
- Unexpected outbound connections from Soft Serve server
SIEM Query:
source="soft-serve" AND (event="git-execute" OR event="process-spawn") AND env_vars="*LD_*"