CVE-2023-21931
Published: 18 April 2023
Summary
CVE-2023-21931 is a high-severity Missing Authentication for Critical Function (CWE-306) vulnerability in Oracle Weblogic Server. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 0.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2023-21931 is a vulnerability in the Core component of Oracle WebLogic Server within Oracle Fusion Middleware. It affects supported versions 12.2.1.3.0, 12.2.1.4.0, and 14.1.1.0.0. The flaw is rated 7.5 under CVSS 3.1 with the vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N and is described as easily exploitable, resulting in high impact to confidentiality.
An unauthenticated attacker with network access via the T3 protocol can exploit the issue to obtain unauthorized access to critical data or full access to all data accessible by the Oracle WebLogic Server instance. The weakness is tracked under CWE-306 and NVD-CWE-noinfo, indicating missing authentication for critical functions.
Oracle's April 2023 Critical Patch Update addresses the vulnerability, and public exploit artifacts have been posted to Packet Storm. The CVE carries an EPSS score that has reached a peak of 0.8554 with a current value of 0.8376, indicating substantial and sustained exploitation interest since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-26096
Vulnerability details
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.3.0, 12.2.1.4.0 and 14.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3 to compromise Oracle WebLogic Server. Successful…
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attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle WebLogic Server accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Requires established identification and authentication to unlock, mitigating missing authentication for continued system access.
Requiring identification and rationale for actions allowed without authentication ensures critical functions are not left unprotected by forcing review of authentication requirements.
Authorizing mobile device connections to organizational systems ensures authentication is performed for this critical access function.
Guarantees critical functions are protected by mandatory invocation of the access control mechanism.
Auditing sessions makes it possible to detect access to critical functions without required authentication.
The assessment process confirms authentication is present and effective for critical functions, preventing exploitation from missing authentication.
Certification assesses that critical functions have required authentication controls in place.
Disabling non-essential functions and services eliminates the need to secure them, reducing exposure from missing authentication on unnecessary components.