Advisory Details

November 23rd, 2020

VMware ESXi SLP Use-After-Free Remote Code Execution Vulnerability

ZDI-20-1377
ZDI-CAN-12190

CVE ID CVE-2020-3992
CVSS SCORE 8.8, (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
AFFECTED VENDORS VMware
AFFECTED PRODUCTS ESXi
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of VMware ESXi. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the processing of SLP messages. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the SLP daemon.

ADDITIONAL DETAILS VMware has issued an update to correct this vulnerability. More details can be found at:
https://www.vmware.com/security/advisories/VMSA-2020-0023.html
DISCLOSURE TIMELINE
  • 2020-10-21 - Vulnerability reported to vendor
  • 2020-11-23 - Coordinated public release of advisory
CREDIT Lucas Leong (@_wmliang_) of Trend Micro's Zero Day Initiative
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