CVEs / CVE-2023-34048
CVE-2023-34048: VMware vCenter Server Out-of-Bounds Write Vulnerability
- Known exploited in the CISA KEV catalog since 22 Jan 2024
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 99.2% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
VMware vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol that allows an attacker to conduct remote code execution.
Description
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 execution.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| VMware VMware vCenter Server | from 8.0, before 8.0U2 | 8.0U2 |
| VMware VMware vCenter Server | from 7.0, before 7.0U3o | 7.0U3o |
| VMware VMware Cloud Foundation (VMware vCenter Server) | 5.x | — |
| VMware VMware Cloud Foundation (VMware vCenter Server) | 4.x | — |
| vmware vcenter_server | from 7.0, before 7.0U3o | 7.0U3o |
| vmware vcenter_server | from 8.0, before 8.0U2 | 8.0U2 |
| vmware cloud_foundation | from 4.0, before KB88287 | KB88287 |
| vmware cloud_foundation | from 5.0, before KB88287 | KB88287 |
Exploitation
| In CISA KEV since | 22 Jan 2024 |
|---|---|
| Due date for US federal agencies | 12 Feb 2024 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-787 |
References
- CVE-2023-34048 on NVD
- CVE-2023-34048 in the CISA KEV catalog
- https://www.vmware.com/security/advisories/VMSA-2023-0023.html (cited by CISA)
- https://www.vmware.com/security/advisories/VMSA-2023-0023.html Vendor Advisory
- https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-server Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34048 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.