CVE-2023-20894Vcenter Server Out-of-Bounds Write
The VMware vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol.
Published Jun 22, 2023 · Updated Feb 13, 2025
Key Facts
Patch immediately- CVE-2023-20894 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Vcenter Server (Vmware), VMware Cloud Foundation (vCenter Server), VMware vCenter Server (vCenter Server).
- It is not listed in any known-exploited vulnerabilities catalog. A public exploit is reported by tracking sources, but no code link is listed yet.
- EPSS estimates a 34% probability of exploitation in the next 30 days.
- Fixed versions are available, including VMware Cloud Foundation (vCenter Server) 7.0 U3m, 8.0 U1b, Vcenter Server 7.0, VMware vCenter Server (vCenter Server) 7.0 u3m.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
34%
Higher than 98.3% of all scored CVEs
Exploit maturity
None known
ATLAS score
34/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
None known
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
Description
The VMware vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol. A malicious actor with network access to vCenter Server may trigger an out-of-bound write by sending a specially crafted packet leading to memory corruption.
Affected Products
35 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Vcenter ServerVmware | 7.0, 7.0-a, 7.0-b, 7.0-c, 7.0-d, 7.0-update1, 7.0-update1a, 7.0-update1c | 7.0 |
| VMware Cloud Foundation (vCenter Server) | >= 5.x | 7.0 U3m, 8.0 U1b |
| VMware vCenter Server (vCenter Server) | >= 8.0 | 8.0 U1b |
Patched Releases
VMware Cloud Foundation (vCenter Server)
7.0 U3m, 8.0 U1b
Vcenter Server
7.0
VMware vCenter Server (vCenter Server)
7.0 u3m, 8.0 U1b
Timeline
Publicly disclosed
Jun 22, 2023
Last updated
Feb 13, 2025
Weakness Type
- CWE-787 Out-of-bounds Write
References
FAQ
Common Questions.
The VMware vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol.
Affected: Vcenter Server (Vmware) versions 7.0, 7.0-a, 7.0-b, 7.0-c, 7.0-d, 7.0-update1, 7.0-update1a, 7.0-update1c; VMware Cloud Foundation (vCenter Server) versions >= 5.x; VMware vCenter Server (vCenter Server) versions >= 8.0. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
A public exploit is reported by tracking sources, but no code link is listed yet.
Fixed versions are available, including VMware Cloud Foundation (vCenter Server) 7.0 U3m, 8.0 U1b, Vcenter Server 7.0, VMware vCenter Server (vCenter Server) 7.0 u3m.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2023-20894 On Your Attack Surface?
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