CVE-2023-34048
VMware vCenter Server Out-of-Bounds Write Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 12 February 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 99.43% probability · 100th percentile
- CISA KEV
- Listed 22 January 2024 · due 12 February 2024
- Weakness
- CWE-787
- Affected
- vmware/vcenter server
- Source
- security@vmware.com
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://www.vmware.com/security/advisories/VMSA-2023-0023.html; https://nvd.nist.gov/vuln/detail/CVE-2023-34048
References
- https://www.vmware.com/security/advisories/VMSA-2023-0023.htmlVendor Advisory
- https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-serverExploit, Third Party Advisory
- https://www.vmware.com/security/advisories/VMSA-2023-0023.htmlVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34048US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.