Vulnerability identifier: #VU71244

Vulnerability risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-21893

CWE-ID: CWE-295

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Oracle Database Server
Server applications / Database software

Vendor: Oracle

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper certificate validation within the ValidateRemoteCertificate function in the Oracle ODP.NET managed driver. A remote attacker can perform MitM attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Oracle Database Server: 19c - 21c

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External links
http://www.oracle.com/security-alerts/cpujan2023.html
http://www.zerodayinitiative.com/advisories/ZDI-23-488/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.