Oracle Database Java VM Vulnerability CVE-2025-30736: Remote Exploitation Risks and Mitigation
Introduction
Oracle Database administrators face a critical security challenge as CVE-2025-30736 emerges, exposing the Java VM component to remote unauthenticated exploitation. This vulnerability significantly threatens data confidentiality and integrity, demanding immediate attention and remediation.
Affected Systems and Versions
- Oracle Database Server Java VM component
- Versions affected:
- 19.3 through 19.26
- 21.3 through 21.17
- 23.4 through 23.7
Technical Information
The vulnerability arises from improper access validation within the Java VM's runtime permission checks. Attackers can exploit this remotely without authentication via network protocols such as Oracle Net or HTTP/S, executing unauthorized Java bytecode. Successful exploitation grants attackers unauthorized capabilities to create, modify, or delete critical data, and full access to Java VM accessible data.
Attack Vectors
- Network Protocol Exploitation: Malicious payloads delivered through Oracle Net or HTTP/S.
- Unauthorized Java Bytecode Execution: Bypasses authentication and JVM sandbox restrictions.
CVSS Vector
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Patch Information
Oracle's April 2025 CPU advisory provides necessary patches. Administrators should apply these immediately upon availability. Interim mitigation includes disabling Java VM execution:
ALTER SYSTEM SET java_jit_enabled = FALSE SCOPE = SPFILE;
Restart the database instance after applying this configuration change.
Detection Methods
Currently, specific detection methods or indicators of compromise for CVE-2025-30736 are not publicly documented.
Vendor Security History
Oracle's Java VM has historically faced multiple vulnerabilities, underscoring persistent security challenges. Past vulnerabilities have been exploited shortly after disclosure, emphasizing the necessity of prompt patch application.
References
Organizations must prioritize immediate patching and proactive security measures to mitigate CVE-2025-30736 effectively.