CVE-2016-1000282
📋 TL;DR
CVE-2016-1000282 is a command injection vulnerability in Haraka's zip attachment processing plugin that allows attackers to execute arbitrary commands on the server. This affects Haraka versions 2.8.8 and earlier when the vulnerable plugin is enabled. Attackers can exploit this by sending specially crafted zip files through email.
💻 Affected Systems
- Haraka
📦 What is this software?
Haraka by Haraka Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with remote code execution as the Haraka process user, potentially leading to data theft, lateral movement, or complete server takeover.
Likely Case
Remote code execution allowing attackers to install malware, exfiltrate data, or use the server as part of a botnet.
If Mitigated
Limited impact if proper network segmentation, least privilege, and monitoring are in place, though command execution would still be possible.
🎯 Exploit Status
Public exploit code exists and exploitation is straightforward - attackers only need to send a malicious email with a crafted zip attachment.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.8.9 and later
Vendor Advisory: https://github.com/haraka/Haraka/blob/master/ChangeLog
Restart Required: Yes
Instructions:
1. Update Haraka to version 2.8.9 or later using npm update haraka. 2. Restart the Haraka service. 3. Verify the update was successful.
🔧 Temporary Workarounds
Disable zip processing in attachment plugin
allDisable zip file processing in the attachment plugin configuration to prevent exploitation.
Edit haraka/config/attachment.ini and set [zip] enabled=false
Disable attachment plugin entirely
allCompletely disable the vulnerable attachment plugin if not required.
Remove 'attachment' from haraka/config/plugins
🧯 If You Can't Patch
- Implement strict network filtering to limit access to Haraka SMTP ports (25, 587, 465) only to trusted sources.
- Deploy application-level WAF or IPS rules to detect and block malicious zip file patterns in email traffic.
🔍 How to Verify
Check if Vulnerable:
Check Haraka version and plugin configuration: 1. Run 'haraka -v' to check version. 2. Check if 'attachment' plugin is enabled in config/plugins. 3. Check if zip processing is enabled in config/attachment.ini.Check Version:
haraka -vVerify Fix Applied:
1. Confirm Haraka version is 2.8.9 or later with 'haraka -v'. 2. Verify the service restarted successfully. 3. Test that zip attachments are either properly sanitized or disabled.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Errors in Haraka logs related to zip processing or attachment plugin
- Failed zip extraction attempts
Network Indicators:
- Unusual outbound connections from Haraka server
- SMTP traffic containing zip files with suspicious filenames or content
SIEM Query:
source="haraka.log" AND ("zip" OR "attachment") AND ("error" OR "failed" OR "exec")