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How the CVE Works
CVE-2025-21553 exploits a flaw in Oracle Database Server’s Java VM component, affecting versions 19.3-19.25, 21.3-21.16, and 23.4-23.6. An attacker with low privileges (Create Session, Create Procedure) can leverage Oracle Net network access to compromise Java VM. The vulnerability is difficult to exploit but can lead to unauthorized data modification (insert/update/delete) and partial unauthorized data reads. The attack requires precise timing and privileges, limiting widespread exploitation. The CVSS 3.1 score of 4.2 reflects moderate confidentiality and integrity risks.
DailyCVE Form
Platform: Oracle Database Server
Version: 19.3-23.6
Vulnerability: Java VM flaw
Severity: Medium
Date: 06/23/2025
Prediction: Patch by Q3 2025
What Undercode Say
SELECT FROM v$java_policy WHERE privilege = 'CREATE_SESSION';
nmap -p 1521 --script oracle-java-vm-check <target_IP>
Exploit
- Requires low privileges
- Oracle Net access
- Timing-dependent attack
Protection from this CVE
- Restrict Create Procedure
- Patch when available
- Network segmentation
Impact
- Data integrity loss
- Partial data leakage
- Limited exploitability
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
