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CVE-2017-4933

HIGHCVSS 8.8/10EPSS 3.57%

Last modified

CVE-2017-4933 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. VMware ESXi (6.5 before ESXi650-201710401-BG), Workstation (12.x before 12.5.8), and Fusion (8.x before 8.5.9) contain a vulnerability that could allow an authenticated VNC session to cause a heap overflow via a specific set of VNC packets resulting in heap corruption. Successful exploitation of this issue could result in remote code execution in a virtual machine via the authenticated VNC session. EPSS estimates a 3.57% chance of exploitation in the next 30 days.

Description

VMware ESXi (6.5 before ESXi650-201710401-BG), Workstation (12.x before 12.5.8), and Fusion (8.x before 8.5.9) contain a vulnerability that could allow an authenticated VNC session to cause a heap overflow via a specific set of VNC packets resulting in heap corruption. Successful exploitation of this issue could result in remote code execution in a virtual machine via the authenticated VNC session. Note: In order for exploitation to be possible in ESXi, VNC must be manually enabled in a virtual machine's .vmx configuration file. In addition, ESXi must be configured to allow VNC traffic through the built-in firewall.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
3.57%

87.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
VmwareWorkstation Pro>= 12.0.0, < 12.5.8
VmwareWorkstation Pro14.0
VmwareWorkstation Pro14.1.0
VmwareEsxi6.5
VmwareFusion>= 8.0.0, < 8.5.9

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2017-4933?
VMware ESXi (6.5 before ESXi650-201710401-BG), Workstation (12.x before 12.5.8), and Fusion (8.x before 8.5.9) contain a vulnerability that could allow an authenticated VNC session to cause a heap overflow via a specific set of VNC packets resulting in heap corruption. Successful exploitation of this issue could result in remote code execution in a virtual machine via the authenticated VNC session. Note: In order for exploitation to be possible in ESXi, VNC must be manually enabled in a virtual machine's .vmx configuration file. In addition, ESXi must be configured to allow VNC traffic through the built-in firewall.
How severe is CVE-2017-4933?
CVE-2017-4933 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 3.57% probability of exploitation in the next 30 days.
How do I fix CVE-2017-4933?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-4933?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST