CVE-2024-0195 Overview
A critical code injection vulnerability has been identified in spider-flow version 0.4.3, an open-source web scraping and automation framework. The vulnerability exists within the FunctionService.saveFunction method located in the FunctionController.java file. This flaw allows remote attackers to inject and execute arbitrary code on the affected system without requiring authentication or user interaction.
Critical Impact
Remote attackers can achieve complete system compromise through code injection, potentially leading to full control over the affected server, data exfiltration, and lateral movement within the network.
Affected Products
- Spider-flow version 0.4.3
- ssssssss spider-flow (cpe:2.3:a:ssssssss:spider-flow:0.4.3)
Discovery Timeline
- 2024-01-02 - CVE-2024-0195 published to NVD
- 2024-11-21 - Last updated in NVD database
Technical Details for CVE-2024-0195
Vulnerability Analysis
This code injection vulnerability (CWE-94) affects the function handling component of spider-flow's web interface. The vulnerable function FunctionService.saveFunction in src/main/java/org/spiderflow/controller/FunctionController.java fails to properly sanitize user-supplied input before processing it in a code execution context.
The attack can be executed remotely over the network with no authentication requirements and no user interaction needed. An attacker can craft malicious requests to the function save endpoint, injecting arbitrary code that will be executed by the server. This results in complete compromise of confidentiality, integrity, and availability of the affected system.
The exploit for this vulnerability has been publicly disclosed, significantly increasing the risk of exploitation in the wild.
Root Cause
The root cause of this vulnerability lies in inadequate input validation and sanitization within the saveFunction method. When users submit function definitions through the spider-flow interface, the application fails to properly validate or escape the input before processing it. This allows attackers to inject malicious code that gets interpreted and executed by the Java runtime environment.
Attack Vector
The attack is conducted remotely over the network by sending specially crafted HTTP requests to the spider-flow application's function management endpoint. The attacker targets the FunctionController.java endpoint that handles function saving operations. By manipulating the function content parameter with malicious code payloads, an attacker can achieve remote code execution on the underlying server.
The vulnerability requires no prior authentication to exploit, making it accessible to any attacker who can reach the spider-flow web interface. For detailed technical information regarding the exploitation mechanism, refer to the GitHub RCE Code Injection documentation.
Detection Methods for CVE-2024-0195
Indicators of Compromise
- Unusual HTTP POST requests to /function/save or similar function management endpoints containing suspicious code patterns
- Unexpected process spawning from the Java application server process
- Anomalous outbound network connections from the spider-flow server
- Modified or newly created files in the spider-flow installation directory
Detection Strategies
- Monitor web application logs for requests to FunctionController endpoints with unusual payload sizes or suspicious characters
- Implement Web Application Firewall (WAF) rules to detect code injection patterns targeting Java applications
- Deploy endpoint detection and response (EDR) solutions to identify post-exploitation activities
- Review application server logs for unexpected code execution or class loading events
Monitoring Recommendations
- Enable detailed logging for the spider-flow application and monitor for suspicious function save operations
- Implement network traffic analysis to detect command and control communications from compromised servers
- Set up alerting for unusual Java process behavior including unexpected child processes or network connections
- Monitor file system changes within the spider-flow installation directory for unauthorized modifications
How to Mitigate CVE-2024-0195
Immediate Actions Required
- Restrict network access to spider-flow instances, placing them behind a VPN or firewall with strict access controls
- Implement authentication requirements for all spider-flow administrative functions if not already enabled
- Consider temporarily disabling the function save feature until a patch is available
- Review system logs for any signs of prior exploitation
Patch Information
No official vendor patch information is currently available. Organizations should monitor the VulDB advisory #249510 and the spider-flow project repository for security updates. Given the critical nature of this vulnerability and the public availability of exploit information, organizations should implement compensating controls immediately while awaiting an official fix.
Workarounds
- Deploy a Web Application Firewall (WAF) with rules to block code injection attempts targeting the function save endpoint
- Implement network segmentation to isolate spider-flow instances from critical systems
- Restrict access to the spider-flow web interface to trusted IP addresses only
- Disable or remove the vulnerable function management feature if it is not operationally required
- Run spider-flow with minimal system privileges to limit the impact of successful exploitation
# Example: Restrict access to spider-flow using iptables
# Allow only specific trusted IP addresses to access the application port
iptables -A INPUT -p tcp --dport 8088 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 8088 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
