SB2021071366 - Multiple vulnerabilities in VMware ESXi)

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Main Vulnerability Database SB2021071366

SB2021071366 - Multiple vulnerabilities in VMware ESXi)

Published: July 13, 2021

Security Bulletin ID SB2021071366
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Improper Authentication (CVE-ID: CVE-2021-21994)

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests in SFCB (Small Footprint CIM Broker). A remote attacker can send specially crafted requests to port 5989/tcp, bypass SFCB authentication and gain unauthorized access to the system.


2) Out-of-bounds read (CVE-ID: CVE-2021-21995)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition when processing requests within the OpenSLP service. A remote attacker can send a specially crafted request to port 427/UDP, trigger a heap out-of-bounds read and perform a denial of service attack.


Remediation

Install update from vendor's website.

References