PT-2021-4020 · Vmware · Vmware Cloud Foundation+1

Victorv · Published 2021-07-13 · Updated 2025-10-31 · CVE-2021-21995

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions VMware ESXi (affected versions not specified)

Description The issue is related to a heap out-of-bounds read problem in the OpenSLP service used by VMware ESXi and VMware Cloud Foundation. This can be exploited by a malicious actor with network access to port 427, potentially leading to a denial-of-service condition. The exploitation involves triggering a heap out-of-bounds read in the OpenSLP service.

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

DoS

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2021-04546

CVE-2021-21995

Affected Products

Vmware Cloud Foundation

Vmware Esxi

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2021-21995 · Security Note
• https://vmware.com/security/advisories/VMSA-2021-0014.html · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-04546 · Security Note
• https://osv.dev/vulnerability/CVE-2021-21995 · Vendor Advisory
• https://t.me/cvenotify/17562 · Telegram Post
• https://t.me/cveNotify/141101 · Telegram Post