CVE-2024-7104: SFS Winsure RCE Vulnerability

CVE-2024-7104 Overview

CVE-2024-7104 is a critical code injection vulnerability (CWE-94) affecting SFS Consulting ww.Winsure, an insurance management software solution. This vulnerability arises from improper control of code generation, allowing attackers to inject and execute arbitrary code within the application context. The flaw exists in versions prior to 4.6.2 and can be exploited remotely without authentication.

Critical Impact

This code injection vulnerability enables unauthenticated remote attackers to execute arbitrary code via network-based attacks, potentially leading to complete system compromise, unauthorized data access, and lateral movement within enterprise environments.

Affected Products

• SFS Consulting ww.Winsure versions prior to 4.6.2
• sfs:winsure component deployments

Discovery Timeline

• 2024-09-16 - CVE-2024-7104 published to NVD
• 2024-09-20 - Last updated in NVD database

Technical Details for CVE-2024-7104

Vulnerability Analysis

This vulnerability stems from improper control of code generation within the ww.Winsure application. The application fails to properly sanitize or validate user-controlled input before incorporating it into dynamically generated code. When malicious input is processed by the vulnerable component, the attacker-supplied code is executed with the privileges of the application process.

The network-accessible nature of this vulnerability significantly increases its risk profile, as attackers can exploit it remotely without requiring prior authentication or user interaction. Successful exploitation could result in high confidentiality impact with potential access to sensitive insurance data, as well as limited integrity impact allowing modification of application behavior.

Root Cause

The root cause of CVE-2024-7104 is the application's failure to implement proper input validation and output encoding when generating code dynamically. The ww.Winsure application does not adequately sanitize user-supplied data before using it in code generation operations, allowing attackers to inject malicious code sequences that are subsequently executed by the application's interpreter or runtime environment.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no authentication or user interaction. An attacker can craft malicious requests containing code injection payloads and send them to the vulnerable ww.Winsure application. The application processes these requests without proper validation, resulting in the execution of the injected code.

The vulnerability mechanism involves user-controllable input being passed to code generation functions without adequate sanitization. When the application processes this input, any embedded code is executed within the application context. For detailed technical analysis, refer to the USOM Security Advisory TR-24-1475.

Detection Methods for CVE-2024-7104

Indicators of Compromise

• Unusual HTTP requests containing code injection patterns targeting ww.Winsure endpoints
• Unexpected process spawning or child processes initiated by the ww.Winsure application
• Anomalous outbound network connections from systems running vulnerable ww.Winsure versions
• Log entries showing malformed or suspicious input patterns in application requests

Detection Strategies

• Deploy web application firewall (WAF) rules to detect and block code injection patterns in HTTP requests
• Implement application-level logging to capture and analyze input parameters for suspicious code sequences
• Monitor for anomalous behavior from ww.Winsure application processes, including unexpected file access or network activity
• Use intrusion detection systems (IDS) with signatures specific to code injection attacks

Monitoring Recommendations

• Enable verbose logging on ww.Winsure application servers to capture all incoming requests and parameters
• Configure SIEM alerts for code injection attack patterns targeting insurance management systems
• Monitor system resource utilization for anomalies that may indicate exploitation attempts
• Implement endpoint detection and response (EDR) solutions to detect post-exploitation activity

How to Mitigate CVE-2024-7104

Immediate Actions Required

• Upgrade ww.Winsure to version 4.6.2 or later immediately
• Implement network segmentation to limit exposure of vulnerable systems
• Deploy WAF rules to filter potential code injection attempts while patches are applied
• Review application logs for evidence of exploitation attempts

Patch Information

SFS Consulting has addressed this vulnerability in ww.Winsure version 4.6.2. Organizations running affected versions should upgrade to this patched release as soon as possible. For additional information, consult the USOM Security Advisory TR-24-1475.

Workarounds

• Restrict network access to ww.Winsure instances using firewall rules to allow only trusted IP addresses
• Implement strict input validation at the network perimeter using a web application firewall
• Consider temporarily disabling vulnerable functionality if business requirements permit
• Deploy application-layer filtering to block requests containing suspicious code patterns

# Network restriction example for limiting access to ww.Winsure
# Allow only trusted internal networks to access the application
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP