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Known Exploited Vulnerability
9.8
CRITICAL CVSS 3.1
CVE-2023-34048
VMware vCenter Server Out-of-Bounds Write Vulnerability - [Actively Exploited]
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.

INFO

Published Date :

Oct. 25, 2023, 6:17 p.m.

Last Modified :

Dec. 20, 2024, 5:41 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

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.

Notes :

https://www.vmware.com/security/advisories/VMSA-2023-0023.html; https://nvd.nist.gov/vuln/detail/CVE-2023-34048

Affected Products

The following products are affected by CVE-2023-34048 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Vmware vcenter_server
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 CRITICAL [email protected]
CVSS 3.1 CRITICAL [email protected]
Solution
This information is provided by the 3rd party feeds.
  • Upgrade to VMware vCenter Server 6.5U3v, 6.7U3t, 7.0U3o, or 8.0U1d or later.
Public PoC/Exploit Available at Github

CVE-2023-34048 has a 2 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-34048.

URL Resource
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.vmware.com/security/advisories/VMSA-2023-0023.html Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-34048 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-34048 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
lebathang/CveCli

Một công cụ dòng lệnh mạnh mẽ để tìm kiếm, phân tích và quét lỗ hổng CVE.

cve-search nmap-scan nuclei-scan python snyk-scan trivy-scan

Python

Updated: 3 weeks, 4 days ago
1 stars 0 fork 0 watcher
Born at : July 31, 2025, 4:51 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
HenriqueBran/Malware-

None

Updated: 1 year, 7 months ago
0 stars 0 fork 0 watcher
Born at : Jan. 22, 2024, 4:10 p.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-34048 vulnerability anywhere in the article.

  • CybersecurityNews
UNC3886 Actors Know for Exploiting 0-Days Attacking Singapore’s Critical Infrastructure

Singapore’s critical infrastructure faces an escalating cyber threat from UNC3886, a sophisticated Chinese state-linked Advanced Persistent Threat (APT) group that has been systematically targeting th ... Read more

Published Date: Jul 29, 2025 (4 weeks, 1 day ago)
  • CybersecurityNews
UNC3886 Hackers Exploiting 0-Days in VMware vCenter/ESXi, Fortinet FortiOS, and Junos OS

Singapore’s critical infrastructure is under siege from UNC3886, a sophisticated China-linked advanced persistent threat (APT) group. As of July 2025, the group has been actively targeting essential s ... Read more

Published Date: Jul 28, 2025 (4 weeks, 1 day ago)
  • Daily CyberSecurity
Fire Ant: Stealthy Cyber-Espionage Campaign Targets VMware ESXi & vCenter, Evades Detection

A stealthy and highly sophisticated cyber-espionage campaign known as Fire Ant has been uncovered by Sygnia’s Incident Response and Threat Intelligence teams. Operating beneath the radar since early 2 ... Read more

Published Date: Jul 28, 2025 (4 weeks, 2 days ago)
  • Daily CyberSecurity
Singapore’s Critical Infrastructure Under Attack by China-Linked UNC3886 APT

The OT Cybersecurity Information Sharing and Analysis Center (OT-ISAC) has released a threat alert detailing an ongoing and highly coordinated cyber-espionage campaign by the China-linked APT group UN ... Read more

Published Date: Jul 28, 2025 (4 weeks, 2 days ago)
  • CybersecurityNews
Fire Ant Hackers Exploiting Vulnerabilities in VMware ESXi and vCenter to Infiltrate Organizations

A sophisticated espionage campaign dubbed “Fire Ant” demonstrates previously unknown capabilities in compromising VMware virtualization infrastructure. Since early 2025, this threat actor has systemat ... Read more

Published Date: Jul 25, 2025 (1 month ago)
  • The Hacker News
Fire Ant Exploits VMware Flaws to Compromise ESXi Hosts and vCenter Environments

Jul 24, 2025Ravie LakshmananVirtualization / Network Security Virtualization and networking infrastructure have been targeted by a threat actor codenamed Fire Ant as part of a prolonged cyber espion ... Read more

Published Date: Jul 24, 2025 (1 month ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jul 03, 2025 (1 month, 3 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jul 02, 2025 (1 month, 3 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jul 02, 2025 (1 month, 3 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jul 02, 2025 (1 month, 3 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jul 02, 2025 (1 month, 3 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jul 01, 2025 (1 month, 3 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jul 01, 2025 (1 month, 3 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jul 01, 2025 (1 month, 3 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jul 01, 2025 (1 month, 3 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jun 30, 2025 (1 month, 3 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jun 30, 2025 (1 month, 3 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jun 30, 2025 (1 month, 3 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jun 30, 2025 (1 month, 4 weeks ago)
  • CrowdStrike.com
How Falcon Next-Gen SIEM Protects Enterprises from VMware vCenter Attacks

Internet-facing assets are targeted for many reasons, such as to establish persistence, evade defensive capabilities, and access sensitive networks. According to the search engine Shodan, approximatel ... Read more

Published Date: Jun 30, 2025 (1 month, 4 weeks ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2023-34048 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Modified Analysis by [email protected]

    Dec. 20, 2024

    Action Type Old Value New Value
    Changed Reference Type https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-server No Types Assigned https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-server Exploit, Third Party Advisory
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-server
    Added Reference https://www.vmware.com/security/advisories/VMSA-2023-0023.html
  • Modified Analysis by [email protected]

    Aug. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Jul. 03, 2024

    Action Type Old Value New Value
    Added CWE CISA-ADP CWE-787
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725

    Jan. 23, 2024

    Action Type Old Value New Value
    Added Vulnerability Name VMware vCenter Server Out-of-Bounds Write Vulnerability
    Added Required Action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
    Added Due Date 2024-02-12
    Added Date Added 2024-01-22
  • Initial Analysis by [email protected]

    Oct. 31, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://www.vmware.com/security/advisories/VMSA-2023-0023.html No Types Assigned https://www.vmware.com/security/advisories/VMSA-2023-0023.html Vendor Advisory
    Added CWE NIST CWE-787
    Added CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:*:*:*:*:*:*:*:* versions from (including) 4.0 up to (including) 5.5 *cpe:2.3:a:vmware:vcenter_server:7.0:-:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:a:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:b:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:c:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:d:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update1:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update1a:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update1c:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update1d:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update2:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update2a:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update2b:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update2c:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update2d:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3a:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3c:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3d:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3e:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3f:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3g:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3h:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3i:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3j:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3k:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3l:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3m:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:update3n:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:8.0:-:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:8.0:a:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:8.0:b:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:8.0:c:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:8.0:update1:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:8.0:update1a:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:8.0:update1b:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:8.0:update1c:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

93.04 }} 0.44%

score

0.99771

percentile