CISA KEV · Known exploitedCritical

CVE-2023-34048

VMware vCenter Server

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
9.8
EPSS
99.4%
99.9% percentile
CISA KEV
Listed
Published
2023.10.26
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability99.4%
Technical severityCVSS 9.8

Vulnerability overview

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 product and versions

Product
VMware vCenter Server
Affected versions
8.0, 7.0, 5.x, 4.x, 4.0, 5.0, >= 4.0 <= 5.5
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

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

Due date: 2024.02.12
  1. 1
    Identify

    Confirm that VMware vCenter Server and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-787
KEV added
2024.01.22
Ransomware use
미확인
CVE-2023-34048 — VMware vCenter Server | SECUFOCUS NOW