CVE-2025-30733: rdbms listener Auth Bypass — Fix

Description

Vulnerability in the RDBMS Listener component of Oracle Database Server. Supported versions that are affected are 19.3-19.26, 21.3-21.17 and 23.4-23.7. Easily exploitable vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise RDBMS Listener. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all RDBMS Listener accessible data. CVSS 3.1 Base Score 6.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N).

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-287 Improper Authentication

Affected Products

Vendor	Product	Versions
oracle	rdbms_listener	19.3 — 19.26
oracle	rdbms_listener	21.3 — 21.17
oracle	rdbms_listener	23.4 — 23.7

References

Advisories & Patches

https://www.oracle.com/security-alerts/cpuapr2025.html

Other References

https://driftnet.io/blog/oracle-tns-memory-leak

Frequently Asked Questions

What is CVE-2025-30733? +

Vulnerability in the RDBMS Listener component of Oracle Database Server. Supported versions that are affected are 19.3-19.26, 21.3-21.17 and 23.4-23.7. Easily exploitable vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise RDBMS Listener. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all RDBMS Listener accessible data. CVSS 3.1 Base Score 6.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-30733? +

CVE-2025-30733 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-30733? +

CVE-2025-30733 affects products from oracle, specifically: rdbms_listener. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-30733? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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