CVE-2023-21934: 
Oracle Database Server vulnerability analysis and mitigation

CVE-2023-21934 is a vulnerability discovered in the Java VM component of Oracle Database Server, affecting versions 19c and 21c. The vulnerability was disclosed in April 2023 as part of Oracle's Critical Patch Update. This security flaw requires a low-privileged attacker with User Account privileges to exploit, though the exploitation is considered difficult (Oracle CPU).

The vulnerability is characterized by a high complexity attack vector requiring network access via TLS. It has received a CVSS 3.1 Base Score of 6.8, indicating moderate severity, with the vector string: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N. This scoring reflects high impacts on both confidentiality and integrity, but no impact on availability (NVD).

Successful exploitation of this vulnerability can result in unauthorized creation, deletion, or modification access to critical data or all Java VM accessible data. Additionally, attackers can gain unauthorized access to critical data or complete access to all Java VM accessible data (Oracle CPU).

Oracle has released patches for this vulnerability as part of its April 2023 Critical Patch Update. Organizations running affected versions (19c and 21c) of Oracle Database Server should apply these security patches without delay to mitigate the risk (Oracle CPU).