Known exploited vulnerability
CVE-2023-34048
The short answer
CVE-2023-34048 affects VMware VMware vCenter Server and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2024-01-22: attackers are using it, so patch it first.
What it is
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.
Weakness: CWE-787.
Severity
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Jan 22, 2024
Federal due date Feb 12, 2024
EPSS, next 30 days
99%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected products
VMware vCenter Server, VMware Cloud Foundation (VMware vCenter Server), vcenter_server, cloud_foundation. NVD's record lists the exact affected versions.
References
- www.vmware.com/security/advisories/VMSA-2023-0023.html Vendor Advisory
- www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-server ExploitThird Party Advisory
- www.vmware.com/security/advisories/VMSA-2023-0023.html Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34048 US Government Resource
Questions
Is CVE-2023-34048 being exploited?
Yes. CISA added CVE-2023-34048 to its Known Exploited Vulnerabilities catalog on 2024-01-22, with a federal remediation due date of 2024-02-12.
How do I fix CVE-2023-34048?
CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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