Advisory Details

February 24th, 2021

VMware ESXi SLP Heap-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2021-21974
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 proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. 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-2021-0002.html
DISCLOSURE TIMELINE	2020-10-30 - Vulnerability reported to vendor 2021-02-24 - Coordinated public release of advisory
CREDIT	Lucas Leong (@_wmliang_) of Trend Micro's Zero Day Initiative

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