VMware vCenter Server Out-of-Bounds Write Vulnerability
Affects VMware vCenter Server 8.0 before 8.0U2 and 7.0 before 7.0U3o, plus VMware Cloud Foundation builds that include vCenter Server. Fixed in 8.0U2 and 7.0U3o.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Fix
- Fixed in 8.0U2, 7.0U3o
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
VMware vCenter Server, the management platform used to control VMware virtual infrastructure, is affected. An attacker with network access to the server could exploit a memory flaw in its DCERPC protocol handling to potentially run malicious code remotely.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original 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.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- VMware VMware vCenter Server
From 8.0 · fixed in 8.0U2; From 7.0 · fixed in 7.0U3o
- VMware VMware Cloud Foundation (VMware vCenter Server)
5.x, 4.x
References 1
vmware.com
Questions about CVE-2023-34048
What does this mean?
The bug is an out-of-bounds write in the DCERPC protocol implementation of vCenter Server. Writing past the end of a memory buffer can potentially lead to remote code execution.Source: support.broadcom.com
Am I affected, and how do I check?
VMware vCenter Server 8.0 before 8.0U2 and 7.0 before 7.0U3o are listed, along with VMware Cloud Foundation builds that include vCenter Server (the advisory's response matrix covers 8.0, 7.0, and VCF 5.x/4.x). Compare the vCenter Server version shown in the vSphere Client or the appliance version output against these ranges.Source: support.broadcom.com
What should I do about it?
Upgrade vCenter Server 8.0 to 8.0U2 or later, or 7.0 to 7.0U3o or later. The checked facts do not list fixed builds for VMware Cloud Foundation, so use the fixed builds in the advisory's response matrix.Source: support.broadcom.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2024-01-22, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data