PT-2021-3175 · Vmware · Vcenter Server+6

Published 2021-05-25 · Updated 2022-07-12 · CVE-2021-21986

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions vSphere Client (HTML5) (affected versions not specified)

Description The issue concerns a vulnerability in the vSphere authentication mechanism for certain plug-ins, including Virtual SAN Health Check, Site Recovery, vSphere Lifecycle Manager, and VMware Cloud Director Availability. This vulnerability could allow a malicious actor with network access to port 443 on vCenter Server to perform actions allowed by the impacted plug-ins without authentication. The vulnerability is related to deficiencies in the authentication procedure, which can be exploited by a remote attacker to bypass authentication or gain unauthorized access to the device.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Missing Authentication

Improper Authentication

Weakness Enumeration

CWE-306

CWE-287

Related Identifiers

BDU:2021-02847

CVE-2021-21986

Affected Products

Site Recovery

Vmware Vcenter

Vmware Cloud Director Availability

Virtual San Health Check

Vcenter Server

Vsphere Client

Vsphere Lifecycle Manager

References · 11

• https://vmware.com/security/advisories/VMSA-2021-0010.html · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-02847 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-21986 · Security Note
• https://osv.dev/vulnerability/CVE-2021-21986 · Vendor Advisory
• https://t.me/isacarusec/4057 · Telegram Post
• http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.html · Note
• https://t.me/true_secator/1751 · Telegram Post
• https://t.me/cybersecuritytechnologies/3493 · Telegram Post
• https://t.me/s_e_reborn/249 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021052634 · Note
• https://t.me/malwr/5102 · Telegram Post