Overview
This blog post explores the details of a significant vulnerability, identified as CVE-2025-30751, present in Oracle Database Server’s component. The vulnerability has a high Common Vulnerability Scoring System (CVSS) severity score of 8.8, indicating a high risk to the confidentiality, integrity, and availability of the affected systems. Users of Oracle Database Server versions 19.3-19.27 and 23.4-23.8 are vulnerable to this exploit, which could potentially allow a low privileged attacker to take over the Oracle Database. The implications of this vulnerability are substantial, as Oracle Database Server is widely used across various industries and sectors globally.
Vulnerability Summary
CVE ID: CVE-2025-30751
Severity: High (CVSS 3.1 score: 8.8)
Attack Vector: Network
Privileges Required: Low (Create Session, Create Procedure privilege)
User Interaction: None
Impact: System compromise or data leakage
Affected Products
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Product | Affected Versions
Oracle Database Server | 19.3-19.27
Oracle Database Server | 23.4-23.8
How the Exploit Works
This vulnerability exploits the Oracle Database component of the Oracle Database Server. An attacker with low-level privileges and network access via Oracle Net can exploit this vulnerability. Once they have gained access, they can manipulate the Oracle Database to compromise the overall Oracle Database Server.
The vulnerability is classified as “easily exploitable,” indicating that the complexity of the exploit is low. An attacker does not need to bypass any authentication mechanisms or have any specialized knowledge about the software. The attacker only needs the ability to create a session and create a procedure, which is a common privilege granted to users.
Conceptual Example Code
The exact method of exploiting this vulnerability is specific to the attacker’s methods and the target system’s configuration. However, a conceptual example of how this might be done is included below:
CREATE OR REPLACE PROCEDURE malicious_procedure AS
BEGIN
EXECUTE IMMEDIATE 'GRANT DBA TO attacker';
END;
/
CALL malicious_procedure();
/
DROP PROCEDURE malicious_procedure;The above pseudocode illustrates the creation of a procedure that grants DBA (Database Administrator) privileges to an attacker. Once the perpetrator has these escalated privileges, they can carry out a wide range of actions, including data manipulation, potentially resulting in a full compromise of the Oracle Database.
As a reminder, the code provided is purely conceptual and not an actual exploit. It’s provided to illustrate the severity and the potential impact of this vulnerability.
Mitigation Guidance
Oracle Database Server users should apply the vendor-provided patch to mitigate this high-risk vulnerability. In the absence of an immediate patch application, users can temporarily mitigate the risk by deploying a web application firewall (WAF) or intrusion detection system (IDS). Regular patching and system updates, combined with robust cybersecurity practices, can help protect systems from such vulnerabilities.