CVE-2024-21271 Overview
CVE-2024-21271 is an authorization vulnerability in the Oracle Field Service product of Oracle E-Business Suite, specifically within the Field Service Engineer Portal component. The flaw affects supported versions 12.2.3 through 12.2.13. A low-privileged attacker with network access via HTTP can exploit the weakness to compromise Oracle Field Service. Successful exploitation results in unauthorized creation, deletion, or modification of critical data and unauthorized read access to all Oracle Field Service accessible data. Oracle addressed the issue in the Oracle Critical Patch Update Advisory - October 2024.
Critical Impact
An authenticated attacker with low privileges can read and modify all data accessible through Oracle Field Service across affected 12.2.x releases.
Affected Products
- Oracle E-Business Suite — Oracle Field Service 12.2.3
- Oracle E-Business Suite — Oracle Field Service versions 12.2.4 through 12.2.12
- Oracle E-Business Suite — Oracle Field Service 12.2.13
Discovery Timeline
- 2024-10-15 - CVE-2024-21271 published to NVD alongside Oracle's October 2024 Critical Patch Update
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-21271
Vulnerability Analysis
CVE-2024-21271 is classified under [CWE-863: Incorrect Authorization]. The Field Service Engineer Portal fails to correctly enforce authorization checks on requests submitted by authenticated users. An attacker holding valid low-privileged credentials can issue HTTP requests that reach records and functions the account should not access.
Oracle's advisory reports impact to confidentiality and integrity, with no direct impact on availability. Because exploitation only requires network reachability and a low-privileged account, the barrier for lateral abuse inside an Oracle E-Business Suite deployment is limited. The EPSS probability sits at 0.441%.
Root Cause
The root cause is improper authorization enforcement inside the Field Service Engineer Portal. Server-side logic does not adequately validate that the requesting principal owns or is entitled to the targeted resource before executing read or write operations. Authenticated sessions therefore obtain effective access to data beyond their intended scope.
Attack Vector
Exploitation occurs over the network via HTTP against the Oracle Field Service portal. The attacker authenticates with any valid low-privileged Field Service account, then submits crafted requests that reference resource identifiers belonging to other users or tenants. The absence of correct authorization checks allows the server to return sensitive records or process unauthorized create, update, and delete operations. User interaction is not required.
No public proof-of-concept exploit is available at the time of writing, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to Oracle's advisory for component-level details.
Detection Methods for CVE-2024-21271
Indicators of Compromise
- Authenticated HTTP requests to Field Service Engineer Portal endpoints that reference resource identifiers outside the requesting user's assigned scope.
- Sudden growth in records read, modified, or deleted by a single low-privileged Field Service account within a short window.
- Session activity from accounts accessing tenant, customer, or engineer records that the account has never previously interacted with.
Detection Strategies
- Review Oracle E-Business Suite application audit logs for anomalous access patterns against Field Service Engineer Portal URIs.
- Correlate HTTP access logs from the fronting web tier with Oracle FND user identity to attribute portal actions to specific accounts.
- Baseline expected data volumes per role and alert on deviations that suggest bulk enumeration of Field Service records.
Monitoring Recommendations
- Enable Oracle E-Business Suite Sign-On Audit and Page Access Tracking for the Field Service responsibility.
- Forward application, database, and web-tier logs into a centralized analytics platform for cross-source correlation and long-term retention.
- Monitor for repeated 4xx responses followed by successful 2xx responses on the same object identifier, which can indicate authorization probing.
How to Mitigate CVE-2024-21271
Immediate Actions Required
- Apply the Oracle Critical Patch Update from October 2024 to all Oracle E-Business Suite environments running Field Service versions 12.2.3 through 12.2.13.
- Inventory every Oracle Field Service account and disable dormant or unused low-privileged accounts that could be leveraged for exploitation.
- Rotate credentials for Field Service Engineer Portal users and enforce multi-factor authentication where supported.
Patch Information
Oracle released fixes for CVE-2024-21271 in the October 2024 Critical Patch Update. Administrators should review the Oracle Security Alert - October 2024 advisory for the specific patch identifiers matching their Oracle E-Business Suite 12.2.x release level and apply them following Oracle's documented EBS patching procedures.
Workarounds
- Restrict network reachability of the Field Service Engineer Portal to trusted corporate networks and VPN ranges until patching is complete.
- Place a web application firewall in front of the Oracle E-Business Suite web tier and enforce rate limits on Field Service portal endpoints.
- Reduce the privilege footprint of Field Service responsibilities so that compromised low-privileged accounts have minimum practical access.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
