Hypervisor-memory disclosure via unchecked XHCI loop
Published Jun 25, 2020 · Updated Aug 4, 2024
Out-of-bounds read in VMware ESXi, Workstation 15.x before 15.5.2, and Fusion 11.x before 11.5.2 lets local users read hypervisor memory. The XHCI controller maps a guest page for DCBs but lets a guest-supplied bit field drive a copy loop beyond the mapped region. Access to a virtual machine is required; exploitation discloses privileged hypervisor data without a reported write or service-interruption impact.
Summary
What happened
Out-of-bounds read in VMware ESXi, Workstation 15.x before 15.5.2, and Fusion 11.x before 11.5.2 lets local users read hypervisor memory. The XHCI controller maps a guest page for DCBs but lets a guest-supplied bit field drive a copy loop beyond the mapped region. Access to a virtual machine is required; exploitation discloses privileged hypervisor data without a reported write or service-interruption impact.
The record
- CVE
- CVE-2020-3965
- Published
- Jun 25, 2020
- Updated
- Aug 4, 2024
- Vendor
- VMware
- Product
- VMware Workstation
- Classifications
- CWE-125, T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 25, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=15.x before 15.5.2
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- ESXi XHCI out-of-bounds read demonstrationproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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