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CVE-2017-4933

HIGH
8.8
CVSS Score
Published: December 20, 2017 at 03:00 PM UTC
Updated: June 17, 2026 at 01:19 AM UTC
4 products affected across 1 vendorESXiFusionWorkstation Pro· also runs on 1 platform

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Severity
HIGH8.8
Exploit prediction
EPSS 4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

ESXi· VMware
95%
6.56.5 650-2017010016.5 650-2017030016.5 650-2017030026.5 650-2017040016.5 650-2017071016.5 650-2017071026.5 650-2017071036.5 650-2017072016.5 650-2017072026.5 650-2017072036.5 650-2017072046.5 650-2017072056.5 650-2017072066.5 650-2017072076.5 650-2017072086.5 650-2017072096.5 650-2017072106.5 650-2017072116.5 650-2017072126.5 650-2017072136.5 650-2017072146.5 650-2017072156.5 650-2017072166.5 650-2017072176.5 650-2017072186.5 650-2017072196.5 650-2017072206.5 650-2017072216.5 650-2017100016.5 before ESXi650-201710401-BG
Fusion· VMware
95%
8 ≤ v < 8.5.9
Affected range stops below 8.5.9, so it looks safe — our inference, not a vendor statement
apple-macos (environment)
Workstation Pro· VMware
95%
12.0.0 ≤ v < 12.5.814.014.1.0
Affected range stops below 12.5.8, so it looks safe — our inference, not a vendor statement
Workstation· VMware
60%
12 ≤ v < 12.5.8
Affected range stops below 12.5.8, so it looks safe — our inference, not a vendor statement

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

VDB Entryx_refsource_SECTRACKThird Party Advisory
Source: [email protected]
http://www.securitytracker.com/id/1040024
VDB Entryx_refsource_SECTRACKThird Party Advisory
Source: [email protected]
http://www.securitytracker.com/id/1040025
x_refsource_CONFIRMIssue TrackingVendor Advisory
Source: [email protected]
https://www.vmware.com/security/advisories/VMSA-2017-0021.html

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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