Cyber Resilience

CVE-2023-20892

High

Published: 22 June 2023

Published
22 June 2023
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0472 89.6th percentile
Risk Priority 19 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-20892 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Vmware Vcenter Server. Its CVSS base score is 8.1 (High).

Operationally, ranked in the top 10.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis

CVE-2023-20892 is a heap overflow vulnerability in VMware vCenter Server caused by the use of uninitialized memory in the DCERPC protocol implementation. The flaw resides in a core component responsible for handling remote procedure calls and affects the vCenter Server product running on its underlying operating system.

A remote attacker with network access to vCenter Server can trigger the flaw without authentication or user interaction. Successful exploitation allows arbitrary code execution on the host operating system with high impact to confidentiality, integrity, and availability, although the CVSS vector notes high attack complexity.

VMware published advisory VMSA-2023-0014 and Cisco Talos released a detailed report (TALOS-2023-1801) addressing the issue. The current EPSS score of 0.0472, with a peak of only 0.0512, indicates limited observed exploitation interest since disclosure.

EU & UK References

Vulnerability details

The vCenter Server contains a heap overflow vulnerability due to the usage of uninitialized memory in the implementation of the DCERPC protocol. A malicious actor with network access to vCenter Server may exploit heap-overflow vulnerability to execute arbitrary code on…

more

the underlying operating system that hosts vCenter Server.

CWE(s)
CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

vmware
vcenter server
7.0, 8.0 · ≤ 7.0

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.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References