CVE-2024-21003: Oracle GraalVM Auth Bypass Vulnerability

CVE-2024-21003 Overview

CVE-2024-21003 is a vulnerability in the JavaFX component of Oracle Java SE and Oracle GraalVM Enterprise Edition. This flaw allows an unauthenticated attacker with network access via multiple protocols to compromise affected systems. Successful exploitation requires human interaction and can result in unauthorized update, insert, or delete access to some accessible data within Oracle Java SE and Oracle GraalVM Enterprise Edition.

This vulnerability specifically applies to Java deployments running sandboxed Java Web Start applications or sandboxed Java applets that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. Server-side Java deployments that load and run only trusted code are not affected.

Critical Impact

Successful exploitation can result in unauthorized modification of data in Oracle Java SE and GraalVM Enterprise Edition environments running untrusted client-side code.

Affected Products

• Oracle Java SE: 8u401
• Oracle GraalVM Enterprise Edition: 20.3.13 and 21.3.9
• Oracle JDK: 1.8.0 Update 401
• Oracle JRE: 1.8.0 Update 401
• NetApp Active IQ Unified Manager (VMware vSphere and Windows)
• NetApp Data Infrastructure Insights Acquisition Unit
• NetApp Data Infrastructure Insights Storage Workload Security Agent
• NetApp OnCommand Insight
• NetApp OnCommand Workflow Automation

Discovery Timeline

• April 16, 2024 - CVE-2024-21003 published to NVD
• March 29, 2025 - Last updated in NVD database

Technical Details for CVE-2024-21003

Vulnerability Analysis

This vulnerability resides in the JavaFX component of Oracle Java SE and GraalVM Enterprise Edition. The flaw enables integrity impacts through unauthorized data modification capabilities. The attack requires network access and human interaction, making it a client-side threat vector that targets users running sandboxed Java applications.

The vulnerability is categorized under CWE-250 (Execution with Unnecessary Privileges), indicating that the affected component may perform operations with elevated or inappropriate privileges during certain conditions. This can allow attackers to manipulate data within the context of the vulnerable Java application when a user interacts with malicious content.

Root Cause

The root cause relates to improper privilege handling within the JavaFX component. When processing certain operations, the component may execute with unnecessary privileges, creating an opportunity for unauthorized data modification. The sandboxed execution environment that normally provides security boundaries for untrusted code may not fully prevent integrity impacts under specific exploitation conditions.

Attack Vector

The attack vector is network-based, requiring an attacker to deliver malicious content to a victim running a sandboxed Java Web Start application or Java applet. Exploitation requires:

1. The victim must be running a vulnerable version of Oracle Java SE or GraalVM Enterprise Edition
2. The victim must load and execute untrusted code (such as content from the internet)
3. Human interaction is required for the attack to succeed
4. The attack must be conducted over the network using various protocols supported by JavaFX

The vulnerability manifests when a sandboxed Java application processes specially crafted content. Attackers can leverage this to perform unauthorized data modifications within the application's accessible scope. For detailed technical analysis, refer to the Oracle CPU April 2024 Alert.

Detection Methods for CVE-2024-21003

Indicators of Compromise

• Unexpected modifications to data within Java applications running sandboxed applets or Web Start applications
• Anomalous JavaFX component behavior or unusual network traffic from Java applications
• Unauthorized data changes in systems running affected Oracle Java SE or GraalVM versions

Detection Strategies

• Monitor for Java processes running vulnerable versions (8u401, GraalVM 20.3.13, 21.3.9)
• Implement application-level logging to detect unauthorized data modifications in Java applications
• Deploy network monitoring to identify suspicious traffic patterns associated with JavaFX applications
• Use endpoint detection to alert on sandboxed Java applications interacting with untrusted network sources

Monitoring Recommendations

• Enable verbose logging for Java applications to capture detailed operation records
• Configure alerts for Java Web Start or applet executions from untrusted sources
• Monitor file integrity for applications that rely on data processed by JavaFX components
• Implement network traffic analysis for connections initiated by Java applications to external sources

How to Mitigate CVE-2024-21003

Immediate Actions Required

• Update Oracle Java SE to a version newer than 8u401
• Upgrade Oracle GraalVM Enterprise Edition beyond versions 20.3.13 and 21.3.9
• Review and apply patches from the Oracle CPU April 2024 Alert
• NetApp customers should review the NetApp Security Advisory NTAP-20240426-0004 for product-specific guidance

Patch Information

Oracle has released patches addressing this vulnerability as part of the April 2024 Critical Patch Update. The official security advisory is available at the Oracle CPU April 2024 Alert. Organizations should prioritize patching systems running client-side Java applications that process untrusted content.

NetApp has also issued guidance for their affected products through their Security Advisory NTAP-20240426-0004.

Workarounds

• Disable Java Web Start and Java applet functionality if not required for business operations
• Implement network-level controls to restrict Java applications from accessing untrusted external content
• Configure Java security settings to block execution of untrusted code
• Isolate systems running vulnerable Java versions from networks with untrusted content

# Configuration example - Disable Java Web Start (Windows)
# Remove or rename the javaws.exe executable
# Location: %JAVA_HOME%\bin\javaws.exe

# For enterprise deployments, use deployment.properties
# Create or modify deployment.properties file:
echo "deployment.webjava.enabled=false" >> "%USERPROFILE%\AppData\LocalLow\Sun\Java\Deployment\deployment.properties"
echo "deployment.javaws.autodownload=NEVER" >> "%USERPROFILE%\AppData\LocalLow\Sun\Java\Deployment\deployment.properties"