CVE-2024-1744: Accord ORS Auth Bypass Vulnerability

CVE-2024-1744 Overview

CVE-2024-1744 is an authorization bypass vulnerability in Ariva Computer Accord ORS. The flaw stems from a user-controlled key combined with missing authorization checks [CWE-639]. Attackers can manipulate object references to retrieve embedded sensitive data without proper authentication. The vulnerability affects all Accord ORS versions before 7.3.2.1. Remote attackers can exploit this issue across the network without user interaction or prior privileges. The Turkish National Cyber Incident Response Center (USOM) published security notification TR-24-1408 to alert affected organizations.

Critical Impact

Unauthenticated remote attackers can bypass authorization controls and retrieve embedded sensitive data from affected Accord ORS deployments.

Affected Products

• Ariva Computer Accord ORS versions before 7.3.2.1
• Deployments exposing the Accord ORS application to network access
• Systems using vulnerable object reference handling in Accord ORS

Discovery Timeline

• 2024-09-06 - CVE-2024-1744 published to the National Vulnerability Database
• 2025-10-14 - Last updated in NVD database

Technical Details for CVE-2024-1744

Vulnerability Analysis

The vulnerability is classified as Authorization Bypass Through User-Controlled Key [CWE-639], commonly known as Insecure Direct Object Reference (IDOR). The application accepts identifiers supplied by the client and uses them to access internal objects without verifying that the requesting user is authorized to view those objects. Attackers can substitute valid object identifiers in requests to access data belonging to other users or system records.

The vulnerability requires no authentication and no user interaction. An attacker only needs network access to the Accord ORS instance. Successful exploitation results in disclosure of embedded sensitive data stored or referenced by the application.

Root Cause

The root cause is missing authorization enforcement on resource access paths that accept user-controlled keys. The application maps client-provided identifiers directly to backend objects without performing an ownership or role check. This pattern matches CWE-639, where access control decisions rely on identifiers that the attacker can guess, enumerate, or modify.

Attack Vector

Exploitation occurs over the network through standard application requests. An attacker enumerates or modifies object identifiers in URLs, request parameters, or API payloads. Because authorization is missing, the server returns the requested data regardless of the requester's identity. No special tooling is required, and the attack complexity is low. See the USOM Security Notification TR-24-1408 for vendor-coordinated details.

Detection Methods for CVE-2024-1744

Indicators of Compromise

• Unusual sequential or incremental access patterns to object identifiers in Accord ORS request logs
• Requests from a single source iterating across resource IDs within short time windows
• High volume of successful responses to anonymous or low-privilege sessions accessing varied object IDs
• Outbound data transfers from Accord ORS servers that exceed normal baselines

Detection Strategies

• Inspect web server and application logs for parameter tampering patterns on endpoints that accept resource identifiers
• Compare requested object IDs against the authenticated user context to detect cross-tenant or cross-user access
• Deploy web application firewall rules that flag enumeration behavior against numeric or predictable identifiers
• Correlate access logs with authentication events to identify unauthenticated retrieval of protected data

Monitoring Recommendations

• Enable verbose logging on all Accord ORS API endpoints and forward logs to a centralized SIEM
• Establish baselines for normal request volume and object access patterns per user
• Alert on bursts of HTTP 200 responses to requests lacking valid session tokens
• Monitor egress traffic from servers running Accord ORS for anomalous data export volumes

How to Mitigate CVE-2024-1744

Immediate Actions Required

• Upgrade Accord ORS to version 7.3.2.1 or later without delay
• Restrict network exposure of Accord ORS to trusted networks until patching is complete
• Review access logs for evidence of prior exploitation against object reference endpoints
• Rotate any credentials, tokens, or secrets that may have been exposed through the application

Patch Information

Ariva Computer addressed this vulnerability in Accord ORS version 7.3.2.1. Organizations running any prior version should upgrade immediately. Refer to the USOM Security Notification TR-24-1408 for the official advisory and coordination details.

Workarounds

• Place Accord ORS behind a reverse proxy or web application firewall that enforces authentication before requests reach the application
• Implement network-level access controls limiting Accord ORS connectivity to authorized client subnets
• Apply strict session validation at the network edge to block unauthenticated requests to object retrieval endpoints
• Audit and disable any unused API endpoints that expose object identifiers in Accord ORS

# Example: restrict Accord ORS access to trusted subnet using iptables
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP