CVE-2024-39911: Fit2cloud 1Panel SQL Injection Vulnerability

CVE-2024-39911 Overview

CVE-2024-39911 is a SQL Injection vulnerability affecting 1Panel, a web-based Linux server management control panel developed by Fit2cloud. The vulnerability exists in the User-Agent handling mechanism, allowing attackers to inject malicious SQL queries through crafted HTTP headers. This flaw enables unauthenticated remote attackers to manipulate database queries, potentially leading to unauthorized data access, data modification, or complete system compromise.

Critical Impact

This SQL injection vulnerability allows unauthenticated remote attackers to execute arbitrary SQL commands via malicious User-Agent headers, potentially leading to full database compromise, data exfiltration, and remote code execution on affected 1Panel installations.

Affected Products

• Fit2cloud 1Panel versions prior to 1.10.12-lts

Discovery Timeline

• 2024-07-18 - CVE-2024-39911 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-39911

Vulnerability Analysis

This vulnerability stems from improper sanitization of the User-Agent HTTP header before it is used in SQL queries within the 1Panel application. When processing incoming HTTP requests, the application extracts the User-Agent string and incorporates it directly into database operations without adequate input validation or parameterized queries.

The attack requires no authentication or user interaction, as the User-Agent header is processed during initial request handling. An attacker can craft malicious HTTP requests with specially constructed User-Agent values containing SQL syntax that breaks out of the intended query context and executes arbitrary SQL commands.

According to external analysis, this SQL injection vulnerability can potentially be chained to achieve remote code execution (RCE), significantly amplifying the severity of this issue for organizations running vulnerable 1Panel installations.

Root Cause

The root cause is classified as CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). The 1Panel application fails to properly sanitize or parameterize user-supplied input from the User-Agent HTTP header before incorporating it into SQL queries. This allows special SQL characters and commands to be interpreted as part of the query structure rather than as literal data values.

Attack Vector

The attack vector is network-based, requiring no privileges and no user interaction. An attacker sends HTTP requests to a vulnerable 1Panel instance with a crafted User-Agent header containing SQL injection payloads. The malicious input is processed by the server and executed against the backend database, allowing the attacker to:

• Extract sensitive information from the database
• Modify or delete data
• Bypass authentication mechanisms
• Potentially achieve remote code execution through database features

The vulnerability is exploited by injecting SQL syntax into the User-Agent header of HTTP requests sent to the 1Panel web interface. Technical details and analysis of the exploitation mechanism can be found in the Mo60 Blog SQL Injection Analysis.

Detection Methods for CVE-2024-39911

Indicators of Compromise

• Unusual or malformed User-Agent strings in web server access logs containing SQL keywords such as UNION, SELECT, INSERT, DROP, or comment characters like -- and /*
• Database error messages in application logs indicating SQL syntax errors
• Unexpected database queries or data modifications in database audit logs
• Anomalous outbound network connections from the database server

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to inspect and block HTTP requests containing SQL injection patterns in the User-Agent header
• Implement real-time log monitoring for requests with suspicious User-Agent values
• Enable database audit logging to detect unauthorized queries or data access patterns
• Use SentinelOne Singularity Platform to monitor for post-exploitation activities such as unusual process spawning or network connections

Monitoring Recommendations

• Monitor HTTP access logs for requests with abnormally long or suspicious User-Agent strings
• Configure alerting for database error rates or unusual query patterns
• Track version information of 1Panel installations across your environment to ensure patching compliance
• Implement network traffic analysis to detect potential data exfiltration following successful exploitation

How to Mitigate CVE-2024-39911

Immediate Actions Required

• Upgrade 1Panel to version 1.10.12-lts or later immediately
• Review web server and database logs for signs of prior exploitation
• Restrict network access to 1Panel administrative interfaces using firewall rules
• Deploy WAF rules to block SQL injection patterns in HTTP headers as a defense-in-depth measure

Patch Information

Fit2cloud has addressed this vulnerability in 1Panel version 1.10.12-lts. Users should upgrade to this version or later to remediate the SQL injection vulnerability. The security advisory is available at the GitHub Security Advisory GHSA-7m53-pwp6-v3f5.

Workarounds

• There are no official workarounds available for this vulnerability according to the vendor advisory
• As a temporary risk reduction measure, restrict network access to 1Panel to trusted IP addresses only
• Consider placing 1Panel behind a reverse proxy with WAF capabilities to filter malicious requests
• Monitor for exploitation attempts while planning for the upgrade to the patched version