Vulnerability identifier: #VU71317

Vulnerability risk: Critical

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-21838

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Oracle WebLogic Server
Server applications / Application servers

Vendor: Oracle

Description

The vulnerability allows a remote non-authenticated attacker to compromise the affected system.

The vulnerability exists due to improper input validation within the ForeignOpaqueReference class. A remote non-authenticated attacker can perform JNDI injection and execute arbitrary Java code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Oracle WebLogic Server: 12.2.1.3.0 - 14.1.1.0.0

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External links
http://www.oracle.com/security-alerts/cpujan2023.html
http://www.zerodayinitiative.com/advisories/ZDI-23-118/
http://www.zerodayinitiative.com/advisories/ZDI-23-241/

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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 Internet.

Is there known malware, which exploits this vulnerability?

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