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CVE-2023-34048 (GCVE-0-2023-34048)

Vulnerability from cvelistv5 – Published: 2023-10-25 04:21 – Updated: 2025-10-21 23:05
VLAI CISA Previdian
Title
VMware vCenter Server Out-of-Bounds Write Vulnerability
Summary
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.
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-11 16:43 UTC
CWE
Impacted products
Vendor Product Version CPE status
VMware VMware vCenter Server Affected: 8.0 , < 8.0U2 (8.0U2)
Affected: 7.0 , < 7.0U3o (7.0U3o)
guessed Create a notification for this product.
VMware VMware Cloud Foundation (VMware vCenter Server) Affected: 5.x
Affected: 4.x
guessed Create a notification for this product.
vmware vcenter_server Affected: 7.0 , < 7.0U3o (custom)
    cpe:2.3:a:vmware:vcenter_server:7.0:-:*:*:*:*:*:*
Create a notification for this product.
vmware vcenter_server Affected: 8.0 , < 8.0U2 (custom)
    cpe:2.3:a:vmware:vcenter_server:8.0:-:*:*:*:*:*:*
Create a notification for this product.
vmware cloud_foundation Affected: 4.0 , < KB88287 (custom)
    cpe:2.3:a:vmware:cloud_foundation:4.0:*:*:*:*:*:*:*
Create a notification for this product.
vmware cloud_foundation Affected: 5.0 , < KB88287 (custom)
    cpe:2.3:a:vmware:cloud_foundation:5.0:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2023-10-25 03:15
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2023-34048

Status: Confirmed

Status Updated: 2024-01-22 00:00 UTC

Exploited: Yes


Timestamps
First Seen: 2024-01-22
Asserted: 2024-01-22

Scope
Notes: KEV entry: VMware vCenter Server Out-of-Bounds Write Vulnerability | Affected: VMware / vCenter Server | Description: 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. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2024-02-12 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://www.vmware.com/security/advisories/VMSA-2023-0023.html; https://nvd.nist.gov/vuln/detail/CVE-2023-34048

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev


Details
Cwes CWE-787
Feed CISA Known Exploited Vulnerabilities Catalog
Product vCenter Server
Due Date 2024-02-12
Date Added 2024-01-22
Vendorproject VMware
Vulnerabilityname VMware vCenter Server Out-of-Bounds Write Vulnerability
Knownransomwarecampaignuse Unknown

References

Created: 2026-02-02 12:26 UTC | Updated: 2026-02-06 07:17 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2023-34048

Status: Confirmed

Status Updated: 2024-01-22 00:00 UTC

Exploited: Yes


Timestamps
First Seen: 2024-01-22
Asserted: 2024-01-22

Scope
Notes: KEVIntel entry: VMware vCenter Server Out-of-Bounds Write Vulnerability | Affected: VMware / VMware vCenter Server, VMware Cloud Foundation (VMware vCenter Server) | CVSS: 9.8 (CRITICAL) | EPSS: 0.99212 | Used in malware: unknown | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel


Details
Feed KEVIntel (kevintel.com)
Title VMware vCenter Server Out-of-Bounds Write Vulnerability
Vendor VMware
Product VMware vCenter Server, VMware Cloud Foundation (VMware vCenter Server)
Added Date 2024-01-22T00:00:00.000Z
Cvss Score 9.8
Epss Score 0.99212
Cvss Severity CRITICAL
Epss Percentile 0.99929
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False

References

Created: 2026-06-23 14:05 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website

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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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