CVE-2025-30749: Oracle Java SE RCE Vulnerability

CVE-2025-30749 Overview

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: 2D). Supported versions that are affected are Oracle Java SE: 8u451, 8u451-perf, 11.0.27, 17.0.15, 21.0.7, 24.0.1; Oracle GraalVM for JDK: 17.0.15, 21.0.7 and 24.0.1; Oracle GraalVM Enterprise Edition: 21.3.14. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in takeover of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition.

Critical Impact
This vulnerability allows for a complete system takeover by an unauthenticated attacker, impacting confidentiality, integrity, and availability.

Affected Products

Oracle JRE 8u451
Oracle JDK 11.0.27
Oracle GraalVM Enterprise Edition 21.3.14

Discovery Timeline

Not Available - Vulnerability discovered by Not Available
Not Available - Responsible disclosure to Oracle
Not Available - CVE CVE-2025-30749 assigned
Not Available - Oracle releases security patch
2025-07-15 - CVE CVE-2025-30749 published to NVD
2025-11-03 - Last updated in NVD database

Technical Details for CVE-2025-30749

Vulnerability Analysis

The vulnerability exists in the 2D component of Oracle Java SE and related products, allowing remote code execution by exploiting weaknesses in handling untrusted code within the Java sandbox, typically in client environments.

Root Cause

The root cause involves improper input validation in the handling of untrusted code executed in the Java environment, specifically within sandboxed Java Web Start applications or applets.

Attack Vector

Attackers can exploit this vulnerability over a network without authentication. The attack can be carried out via multiple protocols, targeting client environments running untrusted Java code.

java

// Example exploitation code (sanitized)
String maliciousInput = "<untrusted code>";
Process process = Runtime.getRuntime().exec(maliciousInput);
process.waitFor();

Detection Methods for CVE-2025-30749

Indicators of Compromise

Unusual network traffic from Java applications
Unexpected changes to application behaviors
Execution of unauthorized processes

Detection Strategies

Implement monitoring for Java application activities, focusing on execution traces that deviate from normal application behavior. Use network security tools to detect anomalous traffic patterns.

Monitoring Recommendations

Employ host and network monitoring solutions to detect suspicious activity. Leverage threat intelligence feeds to update detection signatures specifically targeting Java exploits.

How to Mitigate CVE-2025-30749

Immediate Actions Required

Disable any untrusted Java applets and Web Start applications
Restrict network access to Java components
Update to patched versions as soon as possible

Patch Information

Oracle has released patches for this vulnerability. Ensure your systems are updated to the latest versions as referenced in Oracle's advisory here.

Workarounds

Restrict network access to vulnerable Java deployments and avoid executing untrusted code.

bash

# Configuration example to restrict Java execution
echo "security.manager.enabled=true" >> /etc/java/java.conf
java -Djava.security.manager