CVE-2023-20893 Use after free in VMware Cloud Foundation (vCenter Server)

What is CVE-2023-20893?

CVE-2023-20893 is a high-severity use after free vulnerability in Vmware Vcenter Server, published on 22 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The VMware vCenter Server contains a use-after-free vulnerability in the implementation of the DCERPC protocol. A malicious actor with network access to vCenter Server may exploit this issue to execute arbitrary code on the underlying operating system that hosts vCenter Server.

Weakness: CWE-416

Which versions are affected by CVE-2023-20893?

It affects 1 product.

Products include Vmware Vcenter Server.

How do I fix CVE-2023-20893?

No fix has been published for CVE-2023-20893 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2023-20893 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-20893 exists.

Other vulnerabilities in Vmware Vcenter Server

• CVE-2026-59310 Broadcom VMware vCenter Path Traversal Exploited Critical 9.8
• CVE-2023-34048 VMware vCenter Server Out-of-Bounds Write Exploited Critical 9.8
• CVE-2020-3952 VMware vCenter Server Information Disclosure Exploited Critical 9.8
• CVE-2021-22017 VMware vCenter Server Improper Access Control Exploited Medium 5.3
• CVE-2015-2342 Code injection in n/a Critical 10.0

All Vmware Vcenter Server vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-r9q7-6mw7-hmpc.