CVE-2024-22243: UriComponentsBuilder SSRF Vulnerability

CVE-2024-22243 Overview

Applications that use UriComponentsBuilder to parse an externally provided URL (e.g., through a query parameter) and perform validation checks on the host of the parsed URL may be vulnerable to an open redirect attack or an SSRF attack if the URL is used after passing validation checks.

Critical Impact

This vulnerability could allow attackers to redirect users to malicious websites or initiate server-side requests to potentially harmful locations.

Affected Products

• UriComponentsBuilder

Discovery Timeline

• 2024-02-23 - CVE-2024-22243 published to NVD
• 2025-02-13 - Last updated in NVD database

Technical Details for CVE-2024-22243

Vulnerability Analysis

The vulnerability arises from improper validation of URLs parsed using UriComponentsBuilder. This can lead to open redirect and SSRF attacks if attackers are able to control the input URL after validation.

Root Cause

The core issue is the inadequate validation logic applied to the host component of the URL, which can be manipulated to circumvent intended checks.

Attack Vector

Network-based attacks can exploit this vulnerability, particularly through web applications that expose URL parsing functionalities.

// Example exploitation code (sanitized)
String url = "http://trusted.com?redirect=http://malicious.com";
URI uri = UriComponentsBuilder.fromHttpUrl(url).build().toUri();

if ("trusted.com".equals(uri.getHost())) {
    // Redirect user based on input
    response.sendRedirect(uri.toString());
}

Detection Methods for CVE-2024-22243

Indicators of Compromise

• Unusual redirect patterns in application logs
• Outbound requests to unexpected hosts
• Alerts from web application firewalls

Detection Strategies

Monitoring application logs for redirection patterns and unexpected SSRF activity can help in detecting exploitation attempts. Employ security analytics platforms to identify anomalies in traffic patterns.

Monitoring Recommendations

Use SentinelOne's Singularity platform to detect and respond to threats in real-time by mapping unexpected network activity and monitoring for SSRF signatures.

How to Mitigate CVE-2024-22243

Immediate Actions Required

• Validate and sanitize all user-supplied URL inputs.
• Use allowlists for trusted domains.
• Implement proper output encoding to mitigate open redirect and SSRF attacks.

Patch Information

Review any available vendor patches from Spring and implement them as per guidance.

Workarounds

Enforce strict input validation and encoding to prevent manipulation of URL components.

# Configuration example
replace "http://redirect.com" with a validated domain in configuration files:
sed -i 's|http://redirect.com|http://trusted-domain.com|g' /path/to/config