CVE-2024-5482: Lollms Web UI SSRF Vulnerability

CVE-2024-5482 Overview

A Server-Side Request Forgery (SSRF) vulnerability exists in the add_webpage endpoint of the parisneo/lollms-webui application. The vulnerability arises because the application does not adequately validate URLs entered by users, allowing them to input arbitrary URLs, including those that target internal resources such as localhost or 127.0.0.1. This flaw enables attackers to make unauthorized requests to internal or external systems, potentially leading to access to sensitive data, service disruption, network integrity compromise, business logic manipulation, and abuse of third-party resources.

Critical Impact

Unauthenticated attackers can exploit this SSRF vulnerability to access internal network resources, potentially exfiltrating sensitive data or pivoting to attack other internal systems from a trusted network position.

Affected Products

• lollms lollms_web_ui (all versions)
• parisneo/lollms-webui application
• lollms Web UI installations with the add_webpage endpoint enabled

Discovery Timeline

• June 6, 2024 - CVE-2024-5482 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2024-5482

Vulnerability Analysis

This Server-Side Request Forgery (SSRF) vulnerability in lollms-webui stems from insufficient URL validation in the add_webpage endpoint. When users submit URLs through this endpoint, the application fails to properly sanitize or restrict the target addresses, enabling attackers to craft requests that target internal infrastructure.

The vulnerability allows unauthenticated remote attackers to leverage the server as a proxy for making requests to arbitrary destinations. This includes internal network addresses, cloud metadata endpoints, and sensitive internal services that would otherwise be inaccessible from external networks. The exploitation requires no user interaction and can be performed with network access to the vulnerable endpoint.

Root Cause

The root cause is inadequate input validation on user-supplied URLs in the add_webpage functionality. The application accepts and processes URLs without implementing proper allowlist/blocklist controls, URL scheme restrictions, or internal IP address filtering. This allows attackers to specify internal network addresses (such as 127.0.0.1, localhost, or private IP ranges) that the server then fetches on behalf of the attacker.

Attack Vector

The attack vector is network-based and requires no authentication or user interaction. An attacker can submit a crafted HTTP request to the add_webpage endpoint with a malicious URL parameter pointing to internal resources. The server processes this request and makes an outbound connection to the attacker-specified destination, returning the response data.

Common exploitation scenarios include:

• Accessing cloud provider metadata services (e.g., 169.254.169.254) to retrieve instance credentials
• Scanning internal network ports and services
• Accessing internal admin panels or APIs not exposed to external networks
• Retrieving sensitive configuration files from internal systems
• Abusing trusted network position to attack other internal services

The vulnerability manifests in the URL processing logic of the add_webpage endpoint. For technical implementation details, refer to the Huntr Vulnerability Bounty report.

Detection Methods for CVE-2024-5482

Indicators of Compromise

• Outbound HTTP/HTTPS requests from the lollms-webui server to internal IP ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16)
• Requests to localhost (127.0.0.1) or cloud metadata endpoints (169.254.169.254) originating from the application
• Unusual outbound traffic patterns from the web application server
• Failed connection attempts to internal services logged in network monitoring tools

Detection Strategies

• Monitor web application logs for requests to the add_webpage endpoint containing internal IP addresses or localhost references
• Implement network-level monitoring to detect outbound connections from the application server to private IP ranges
• Configure web application firewalls (WAF) to flag and block SSRF patterns in URL parameters
• Deploy SentinelOne Singularity XDR to detect anomalous network behavior and process activity indicative of SSRF exploitation

Monitoring Recommendations

• Enable detailed logging for all requests to the add_webpage endpoint
• Set up alerts for outbound connections to RFC 1918 private address spaces from the lollms-webui application
• Monitor DNS queries from the application server for suspicious internal hostnames
• Track cloud metadata endpoint access attempts from application workloads

How to Mitigate CVE-2024-5482

Immediate Actions Required

• Restrict network access to the add_webpage endpoint using firewall rules or authentication requirements
• Implement egress filtering to prevent the application server from making connections to internal network ranges
• Consider disabling the add_webpage functionality if not required for operations
• Deploy a web application firewall with SSRF protection rules in front of the lollms-webui application

Patch Information

Check the lollms-webui GitHub repository for the latest security updates. Review the Huntr Vulnerability Bounty report for additional remediation guidance from the security researchers.

Workarounds

• Implement network segmentation to isolate the lollms-webui server from sensitive internal resources
• Configure egress firewall rules to block outbound connections to private IP ranges and cloud metadata endpoints
• Use a reverse proxy with URL validation to filter requests before they reach the application
• Restrict access to the add_webpage endpoint to trusted users only through authentication controls

# Example iptables rules to block SSRF to internal networks
# Block outbound to private IP ranges from application server
iptables -A OUTPUT -d 10.0.0.0/8 -j DROP
iptables -A OUTPUT -d 172.16.0.0/12 -j DROP
iptables -A OUTPUT -d 192.168.0.0/16 -j DROP
iptables -A OUTPUT -d 127.0.0.0/8 -j DROP
iptables -A OUTPUT -d 169.254.169.254 -j DROP