VMware vCenter Server - RCE (CVE-2023-34048)
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.
psychologyCrowdSec Analysis
CVE-2023-34048 is a critical out-of-bounds write vulnerability in VMware vCenter Server's DCERPC protocol implementation, which can be exploited remotely by attackers with network access. Successful exploitation could allow threat actors to execute arbitrary code on the affected system, potentially leading to full system compromise and further attacks within the network.
CrowdSec has been tracking this vulnerability and its exploits since 26th of November 2025.
CrowdSec has not observed any significant exploitation activity targeting CVE-2023-34048 across its network. As a result, no community-driven trend analysis is available for this vulnerability at this time.
Attackers exploit the vCenter Server DCERPC protocol by sending crafted requests to endpoints such as /sdk/, often using SOAP payloads, to trigger remote code execution vulnerabilities. Observed exploitation attempts typically target the /sdk/ path on vCenter Server instances.
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| Event | Date |
|---|---|
| CVE Published | 2023-10-25 |
| CISA KEV | 2024-01-22 |
| CISA Remediation Deadline | 2024-02-12 |
| Rule Released | 2025-11-26 |
Related Weaknesses
Remediation & Protection
External References
- https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-server
- https://www.vmware.com/security/advisories/VMSA-2023-0023.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34048
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-34048.yaml