How severe is CVE-2023-34048?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-34048 known to be exploited?

Yes. CVE-2023-34048 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-01-22), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.

Vulnerability in Vmware Cloud Foundation (Vmware Vcenter Server)

CVE-2023-34048

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-bounds write potentially leading to remote code execut…

EPSS: 0.932 (99.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Vmware Cloud Foundation (Vmware Vcenter Server) — versions 5.x, 4.x
Vmware Vcenter Server — versions 8.0, 7.0

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2024-01-22. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2024-02-12.

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Public proof-of-concept exploits

References

www.vmware.com/security/advisories/VMSA-2023-0023.html

Frequently asked questions

What is CVE-2023-34048?: CVE-2023-34048 is a critical-severity vulnerability in Vmware Cloud Foundation (Vmware Vcenter Server). CVSS score: 9.8/10. Published 2023-10-25.
How severe is CVE-2023-34048?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-34048 known to be exploited?: Yes. CVE-2023-34048 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-01-22), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.