CVE-2024-20927 Overview
CVE-2024-20927 is a critical vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware, specifically affecting the Core component. This easily exploitable flaw allows an unauthenticated attacker with network access via HTTP to compromise Oracle WebLogic Server. The vulnerability has a scope change impact, meaning successful exploitation can significantly affect additional products beyond the vulnerable component itself.
Critical Impact
Successful exploitation enables unauthorized creation, deletion, or modification of critical data or all Oracle WebLogic Server accessible data, with potential cascading effects on connected systems.
Affected Products
- Oracle WebLogic Server 12.2.1.4.0
- Oracle WebLogic Server 14.1.1.0.0
- Oracle Fusion Middleware environments running affected WebLogic Server versions
Discovery Timeline
- February 17, 2024 - CVE-2024-20927 published to NVD
- March 18, 2025 - Last updated in NVD database
Technical Details for CVE-2024-20927
Vulnerability Analysis
This vulnerability resides in the Core component of Oracle WebLogic Server and represents an Improper Access Control (CWE-284) weakness. The flaw allows unauthenticated remote attackers to bypass security controls and perform unauthorized operations on critical data managed by the WebLogic Server instance.
The vulnerability is particularly concerning because it exhibits a scope change characteristic. This means that while the vulnerable component is WebLogic Server itself, successful exploitation can extend impact to other products and resources that interact with or depend on the compromised WebLogic instance. The attack requires no user interaction and no authentication, making it highly accessible to malicious actors.
Root Cause
The root cause of CVE-2024-20927 lies in improper access control mechanisms within the WebLogic Server Core component. The vulnerability stems from insufficient validation or enforcement of authorization policies, allowing network-accessible HTTP requests to bypass security controls. This enables unauthorized data manipulation operations that should normally require proper authentication and authorization.
Attack Vector
The attack vector for this vulnerability is network-based, specifically targeting HTTP endpoints exposed by Oracle WebLogic Server. An unauthenticated attacker can craft malicious HTTP requests that exploit the improper access control weakness in the Core component.
The attack flow typically involves:
- Identifying a vulnerable Oracle WebLogic Server instance accessible via HTTP
- Crafting specially formatted HTTP requests that bypass the flawed access control mechanisms
- Executing unauthorized operations including creation, deletion, or modification of critical data
- Potentially leveraging the scope change to impact connected systems and applications
Due to the low attack complexity and no requirement for authentication or user interaction, this vulnerability presents a significant risk to exposed WebLogic Server deployments.
Detection Methods for CVE-2024-20927
Indicators of Compromise
- Unusual HTTP traffic patterns targeting WebLogic Server administrative or data endpoints
- Unexpected data modifications or deletions in WebLogic-managed resources
- Anomalous access logs showing requests to Core component endpoints from unauthorized sources
- Evidence of data integrity issues in applications relying on WebLogic Server
Detection Strategies
- Implement network-based intrusion detection signatures for suspicious HTTP requests targeting WebLogic Server
- Deploy web application firewall (WAF) rules to filter potentially malicious requests to WebLogic endpoints
- Enable comprehensive access logging on WebLogic Server instances and monitor for unauthorized access attempts
- Utilize SentinelOne Singularity Platform for behavioral detection of exploitation attempts
Monitoring Recommendations
- Monitor WebLogic Server access logs for requests from unexpected IP addresses or unusual request patterns
- Implement file integrity monitoring on WebLogic configuration and data directories
- Set up alerts for unauthorized data modification events in WebLogic-connected databases
- Review application logs for signs of data corruption or unexpected state changes
How to Mitigate CVE-2024-20927
Immediate Actions Required
- Apply the Oracle Critical Patch Update (CPU) from January 2024 immediately
- Restrict network access to WebLogic Server administrative interfaces to trusted networks only
- Implement network segmentation to limit exposure of vulnerable WebLogic instances
- Enable enhanced logging and monitoring on all WebLogic Server deployments
Patch Information
Oracle has released a security patch addressing CVE-2024-20927 as part of the Oracle Critical Patch Update January 2024. Organizations running Oracle WebLogic Server versions 12.2.1.4.0 or 14.1.1.0.0 should apply this patch immediately.
The patch addresses the improper access control vulnerability in the Core component, implementing proper authorization enforcement for affected operations. Before applying the patch, review the Oracle security advisory for any prerequisite patches or compatibility considerations specific to your environment.
Workarounds
- Place WebLogic Server behind a reverse proxy with strict access control rules
- Implement IP whitelisting to restrict access to known trusted sources only
- Disable or restrict access to non-essential WebLogic Server endpoints
- Deploy network-level controls such as firewalls to limit HTTP access to WebLogic instances
# Example: Restrict WebLogic Server access using iptables
# Allow access only from trusted network (example: 10.0.0.0/24)
iptables -A INPUT -p tcp --dport 7001 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 7001 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
