CVE-2021-44685
📋 TL;DR
CVE-2021-44685 is a critical OS command injection vulnerability in Git-it that allows attackers to execute arbitrary commands on the system. Users running Git-it version 4.4.0 or earlier are affected when they complete the 'Branches Aren't Just For Birds' challenge. The vulnerability occurs because user-controlled branch names are not sanitized before being passed to system commands.
💻 Affected Systems
- Git-it
📦 What is this software?
Git It by Git It Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the host, allowing data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation or arbitrary command execution within the context of the Git-it application user, potentially leading to data exfiltration or further system compromise.
If Mitigated
Limited impact if Git-it runs in a sandboxed environment with minimal privileges and network restrictions.
🎯 Exploit Status
Exploitation requires user interaction to complete the vulnerable challenge step. The vulnerability is well-documented with proof-of-concept available in public advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.4.1 and later
Vendor Advisory: https://github.com/jlord/git-it-electron/releases
Restart Required: Yes
Instructions:
1. Download Git-it version 4.4.1 or later from the official repository. 2. Uninstall the vulnerable version. 3. Install the patched version. 4. Restart the application.
🔧 Temporary Workarounds
Avoid Vulnerable Challenge
allDo not complete the 'Branches Aren't Just For Birds' challenge in Git-it until patched.
Run with Restricted Privileges
allRun Git-it with minimal user privileges to limit potential damage from exploitation.
🧯 If You Can't Patch
- Remove or disable Git-it from affected systems
- Implement application whitelisting to prevent unauthorized command execution
🔍 How to Verify
Check if Vulnerable:
Check Git-it version: if version is 4.4.0 or earlier, the system is vulnerable.Check Version:
Check application version in Git-it's About menu or settingsVerify Fix Applied:
Verify Git-it version is 4.4.1 or later after patching.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns from Git-it process
- Suspicious system commands containing branch names
Network Indicators:
- Unexpected outbound connections from Git-it process
SIEM Query:
process_name:"git-it" AND command_line:"reflog" AND command_line:("|" OR ";" OR "&" OR "`")