CVE-2013-7378
📋 TL;DR
CVE-2013-7378 is a command injection vulnerability in Hubot Scripts for Node.js that allows remote attackers to execute arbitrary commands on affected systems. The vulnerability exists in the email.coffee script where user input is improperly sanitized before being passed to system commands. This affects organizations using Hubot with the vulnerable email script module.
💻 Affected Systems
- Hubot Scripts module for Node.js
📦 What is this software?
Hubot Scripts by Hubot Scripts Project
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary commands with the privileges of the Hubot process, potentially leading to data theft, system destruction, or lateral movement within the network.
Likely Case
Remote code execution allowing attackers to run arbitrary commands, potentially leading to data exfiltration, installation of backdoors, or use of the system as a pivot point for further attacks.
If Mitigated
Limited impact if Hubot runs with minimal privileges, network access is restricted, and input validation is implemented at the application layer.
🎯 Exploit Status
Exploitation is straightforward as it involves command injection through unsanitized input. Public exploit details are available in security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.4.4
Vendor Advisory: https://github.com/github/hubot-scripts/commit/feee5abdb038a229a98969ae443cdb8a61747782
Restart Required: Yes
Instructions:
1. Update Hubot Scripts module to version 2.4.4 or later using npm update hubot-scripts. 2. Restart the Hubot service to apply the fix. 3. Verify the update was successful by checking the package version.
🔧 Temporary Workarounds
Remove vulnerable email script
allDisable or remove the email.coffee script from Hubot if email functionality is not required
rm scripts/email.coffee
Implement input validation
allAdd input sanitization to prevent command injection in the email script
🧯 If You Can't Patch
- Run Hubot with minimal privileges using a non-root user account
- Implement network segmentation to restrict Hubot's network access
🔍 How to Verify
Check if Vulnerable:
Check if Hubot Scripts version is below 2.4.4 and if the email.coffee script is present in the scripts directoryCheck Version:
npm list hubot-scriptsVerify Fix Applied:
Verify Hubot Scripts version is 2.4.4 or higher and test email functionality with malicious input to ensure no command execution occurs📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Unexpected processes spawned by the Hubot user
- Failed or successful exploitation attempts in application logs
Network Indicators:
- Unusual outbound connections from Hubot server
- Command and control traffic patterns
SIEM Query:
process.name:cmd.exe OR process.name:bash AND parent.process.name:node AND user:hubot🔗 References
- http://www.openwall.com/lists/oss-security/2014/05/13/1
- http://www.openwall.com/lists/oss-security/2014/05/15/2
- https://github.com/github/hubot-scripts/commit/feee5abdb038a229a98969ae443cdb8a61747782
- https://web.archive.org/web/20140731222413/https://nodesecurity.io/advisories/Hubot_Potential_command_injection_in_email.coffee
- http://www.openwall.com/lists/oss-security/2014/05/13/1
- http://www.openwall.com/lists/oss-security/2014/05/15/2
- https://github.com/github/hubot-scripts/commit/feee5abdb038a229a98969ae443cdb8a61747782
- https://web.archive.org/web/20140731222413/https://nodesecurity.io/advisories/Hubot_Potential_command_injection_in_email.coffee
