CVE-2022-2550
📋 TL;DR
This CVE describes an OS command injection vulnerability in Hestia Control Panel that allows authenticated attackers to execute arbitrary commands on the underlying operating system. The vulnerability affects all HestiaCP installations prior to version 1.6.5. Attackers with administrative access can exploit this to gain full control of the server.
💻 Affected Systems
- Hestia Control Panel
📦 What is this software?
Control Panel by Hestiacp
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise allowing attackers to execute arbitrary commands as the web server user, potentially leading to privilege escalation, data theft, installation of backdoors, or use as a pivot point in the network.
Likely Case
Authenticated attackers with administrative privileges can execute arbitrary commands, potentially gaining shell access, modifying configurations, accessing sensitive data, or disrupting services.
If Mitigated
With proper access controls and network segmentation, impact is limited to the web application layer, though command execution could still affect the hosting environment.
🎯 Exploit Status
Exploit requires administrative credentials. The vulnerability is well-documented with public proof-of-concept available through the huntr.dev bounty program.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.5 and later
Vendor Advisory: https://github.com/hestiacp/hestiacp/commit/3d4c309cf138943cfd1e71ae51556406987aa4bf
Restart Required: No
Instructions:
1. Backup your current HestiaCP installation and configuration. 2. Update HestiaCP using the built-in updater or command line. 3. Verify the update completed successfully by checking the version.
🔧 Temporary Workarounds
Restrict Administrative Access
linuxLimit administrative access to trusted IP addresses only using firewall rules or web server configuration.
# Example: Restrict access to specific IP in Apache
<Location "/hestia">
Require ip 192.168.1.0/24
</Location>
Implement Web Application Firewall
linuxDeploy a WAF with command injection detection rules to block exploitation attempts.
# Example ModSecurity rule
SecRule ARGS "@rx [;&|`$()]" \
"id:1001,phase:2,deny,status:403,msg:'Command Injection Attempt'"
🧯 If You Can't Patch
- Implement strict network segmentation to isolate HestiaCP from critical systems
- Enforce multi-factor authentication for all administrative accounts and monitor for suspicious login attempts
🔍 How to Verify
Check if Vulnerable:
Check HestiaCP version via web interface dashboard or run 'v-list-sys-info' command. If version is below 1.6.5, the system is vulnerable.Check Version:
v-list-sys-info | grep 'Hestia'Verify Fix Applied:
After updating, verify version is 1.6.5 or higher using 'v-list-sys-info' command or web interface.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Multiple failed login attempts followed by successful administrative login
- Suspicious POST requests to HestiaCP administrative endpoints with shell metacharacters
Network Indicators:
- Unusual outbound connections from the HestiaCP server
- Traffic to known malicious IPs or domains
SIEM Query:
source="hestia_access.log" AND (method="POST" AND (uri="/list/" OR uri="/add/" OR uri="/delete/") AND (query CONTAINS "&" OR query CONTAINS ";" OR query CONTAINS "|" OR query CONTAINS "`"))