CVE-2024-13061: 2100 Technology Auth Bypass Vulnerability

CVE-2024-13061 Overview

The Electronic Official Document Management System from 2100 Technology contains a critical Authentication Bypass vulnerability (CWE-290: Authentication Bypass by Spoofing). Although the product enforces an IP whitelist for the API used to query user tokens, unauthenticated remote attackers can still deceive the server to obtain tokens of arbitrary users, which can then be used to log into the system.

Critical Impact

Unauthenticated attackers can bypass IP whitelist controls to obtain arbitrary user tokens, enabling complete system compromise with full confidentiality, integrity, and availability impact.

Affected Products

• 2100 Technology Electronic Official Document Management System

Discovery Timeline

• 2024-12-31 - CVE-2024-13061 published to NVD
• 2025-01-02 - Last updated in NVD database

Technical Details for CVE-2024-13061

Vulnerability Analysis

This vulnerability represents a critical authentication bypass flaw in the Electronic Official Document Management System. The system implements an IP whitelist mechanism intended to restrict access to a sensitive API endpoint responsible for querying user tokens. However, the implementation contains a fundamental flaw that allows attackers to spoof their source IP address or manipulate request headers to bypass this whitelist validation.

Once the IP whitelist is bypassed, attackers can query the token API to obtain authentication tokens for any user in the system, including administrative accounts. These tokens can subsequently be used to authenticate to the application as the targeted user, completely circumventing the normal authentication process. The vulnerability requires no prior authentication or user interaction, making it particularly dangerous for internet-facing deployments.

Root Cause

The root cause of this vulnerability is improper implementation of IP-based access controls (CWE-290: Authentication Bypass by Spoofing). The application likely relies on client-provided HTTP headers such as X-Forwarded-For, X-Real-IP, or similar headers to determine the source IP address for whitelist validation. Attackers can manipulate these headers to spoof trusted IP addresses, bypassing the whitelist protection entirely. This represents a fundamental security architecture flaw where security controls are based on easily spoofable client-provided data rather than cryptographic authentication mechanisms.

Attack Vector

The attack can be executed remotely over the network without any authentication or user interaction. An attacker would craft HTTP requests to the vulnerable token query API endpoint with manipulated IP-related headers to bypass the whitelist. The typical attack flow involves:

1. Identifying the target Electronic Official Document Management System instance
2. Crafting requests with spoofed IP headers (e.g., X-Forwarded-For: trusted-ip)
3. Querying the token API to retrieve authentication tokens for target users
4. Using the obtained tokens to authenticate as those users
5. Gaining full access to the document management system with the compromised user's privileges

The vulnerability mechanism involves HTTP header manipulation to bypass IP whitelist validation. When the application receives requests, it incorrectly trusts client-supplied headers for IP verification rather than using the actual TCP connection source address. Attackers can inject trusted IP addresses into headers like X-Forwarded-For to appear as if requests originate from whitelisted sources, thereby gaining access to the token query API. For detailed technical analysis, refer to the TW-CERT Security Advisory.

Detection Methods for CVE-2024-13061

Indicators of Compromise

• Unusual API requests to token query endpoints from external IP addresses
• Multiple requests with manipulated X-Forwarded-For or X-Real-IP headers
• Authentication events for users from unexpected geographic locations or IP ranges
• Sudden spike in token generation or authentication API calls
• Log entries showing successful authentication immediately following suspicious API access

Detection Strategies

• Monitor HTTP request logs for discrepancies between connection source IP and X-Forwarded-For header values
• Implement alerting for authentication API endpoints receiving requests with multiple or suspicious IP header values
• Deploy web application firewall (WAF) rules to detect IP header spoofing attempts
• Analyze authentication patterns for anomalous token usage or cross-user authentication attempts

Monitoring Recommendations

• Enable verbose logging on the Electronic Official Document Management System, particularly for authentication-related APIs
• Implement SIEM correlation rules to detect IP spoofing patterns in web server logs
• Monitor for unusual user session patterns, such as simultaneous logins from disparate locations
• Review access logs regularly for requests to sensitive API endpoints from non-whitelisted apparent sources

How to Mitigate CVE-2024-13061

Immediate Actions Required

• Restrict network access to the Electronic Official Document Management System to trusted networks only
• Implement additional authentication layers such as multi-factor authentication (MFA)
• Review and audit all user accounts for signs of unauthorized access
• Consider taking the system offline if exposure to untrusted networks cannot be immediately remediated

Patch Information

Organizations should contact 2100 Technology directly for security patches and remediation guidance. Additional information is available from TW-CERT Security Advisory and CHT Security News Update.

Workarounds

• Place the document management system behind a reverse proxy or load balancer that properly strips and rewrites client IP headers
• Implement network-level IP restrictions using firewall rules rather than application-level whitelist controls
• Deploy a Web Application Firewall (WAF) to filter requests with suspicious header manipulation
• Consider implementing certificate-based client authentication as an additional access control layer

# Example: Configure reverse proxy to strip untrusted headers (nginx)
# Add to nginx server block configuration
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
# This ensures headers reflect actual client IP, not spoofed values