Known Exploited Vulnerability
5.3
MEDIUM
CVE-2021-21973
VMware vCenter Server and Cloud Foundation Server - [Actively Exploited]
Description

The vSphere Client (HTML5) contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure. This affects: VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).

INFO

Published Date :

Feb. 24, 2021, 5:15 p.m.

Last Modified :

Feb. 15, 2024, 8:18 p.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

1.4

Exploitability Score :

3.9
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

VMware vCenter Server and Cloud Foundation Server contain a SSRF vulnerability due to improper validation of URLs in a vCenter Server plugin. This allows for information disclosure.

Required Action :

Apply updates per vendor instructions.

Public PoC/Exploit Available at Github

CVE-2021-21973 has a 22 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2021-21973 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Vmware vcenter_server
2 Vmware cloud_foundation
: Total Affected Vendor : 1 | Products : 2
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-21973.

URL Resource
https://www.vmware.com/security/advisories/VMSA-2021-0002.html Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
XiaomingX/awesome-poc-for-red-team

None

Updated: 5 days, 1 hour ago
0 stars 2 fork 2 watcher
Born at : Nov. 17, 2024, 11:53 a.m. This repo has been linked 414 different CVEs too.
Profile Photo
IES-Rafael-Alberti/Proyecto1_CybersecurityConsulting

None

Updated: 1 month ago
1 stars 0 fork 0 watcher
Born at : Oct. 8, 2024, 11:51 a.m. This repo has been linked 12 different CVEs too.
Profile Photo
J1ezds/Vulnerability-Wiki-page

这是一个每天同步Vulnerability-Wiki中docs-base中内容的项目

HTML

Updated: 2 months ago
0 stars 0 fork 0 watcher
Born at : Sept. 20, 2024, 3:27 a.m. This repo has been linked 203 different CVEs too.
Profile Photo
NaInSec/CVE-PoC-in-GitHub

All CVE - PoC in GitHub

poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate

Updated: 2 months, 3 weeks ago
5 stars 2 fork 2 watcher
Born at : March 22, 2024, 3:58 p.m. This repo has been linked 928 different CVEs too.
Profile Photo
zecool/cve

None

Updated: 8 months, 1 week ago
1 stars 0 fork 0 watcher
Born at : March 11, 2024, 1:21 p.m. This repo has been linked 930 different CVEs too.
Profile Photo
d4n-sec/d4n-sec.github.io

None

CSS HTML JavaScript

Updated: 9 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Feb. 2, 2024, 2:11 p.m. This repo has been linked 494 different CVEs too.
Profile Photo
0day404/vulnerability-poc

A Common Vulnerability PoC Knowledge Base一个普遍漏洞POC知识库

vulnerability

Updated: 4 months, 1 week ago
17 stars 6 fork 6 watcher
Born at : June 24, 2023, 3:12 p.m. This repo has been linked 232 different CVEs too.
Profile Photo
whoforget/CVE-POC

None

Updated: 1 year, 7 months ago
0 stars 2 fork 2 watcher
Born at : April 8, 2023, 6:19 a.m. This repo has been linked 923 different CVEs too.
Profile Photo
k0mi-tg/CVE-POC

None

Updated: 9 months, 1 week ago
20 stars 3 fork 3 watcher
Born at : Feb. 14, 2023, 6:10 p.m. This repo has been linked 921 different CVEs too.
Profile Photo
WhooAmii/POC_to_review

None

Updated: 9 months ago
2 stars 2 fork 2 watcher
Born at : Nov. 25, 2022, 5:43 p.m. This repo has been linked 930 different CVEs too.
Profile Photo
iamramahibrah/NSE-Scripts

None

Lua

Updated: 2 years, 4 months ago
0 stars 0 fork 0 watcher
Born at : June 22, 2022, 7:15 p.m. This repo has been linked 4 different CVEs too.
Profile Photo
soosmile/POC

None

Updated: 4 months, 3 weeks ago
8 stars 1 fork 1 watcher
Born at : June 21, 2022, 7:45 a.m. This repo has been linked 943 different CVEs too.
Profile Photo
Ostorlab/KEV

Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.

cisa-kev vulnerability 0day cisa exploits

Updated: 2 months, 2 weeks ago
516 stars 32 fork 32 watcher
Born at : April 19, 2022, 8:58 a.m. This repo has been linked 1181 different CVEs too.
Profile Photo
Threekiii/Awesome-POC

一个漏洞POC知识库 目前数量 1000+

poc

Updated: 2 months, 2 weeks ago
3417 stars 682 fork 682 watcher
Born at : Feb. 20, 2022, 6:43 a.m. This repo has been linked 405 different CVEs too.
Profile Photo
SexyBeast233/SecBooks

安全类各家文库大乱斗

HTML CSS JavaScript Go Python Shell C

Updated: 2 months, 2 weeks ago
856 stars 214 fork 214 watcher
Born at : Feb. 15, 2022, 3:14 a.m. This repo has been linked 568 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-21973 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-21973 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Reanalysis by [email protected]

    Feb. 15, 2024

    Action Type Old Value New Value
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.7:u3:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.7:update3:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.7:u3a:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.7:update3a:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.7:u2c:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.7:update2c:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.7:u2a:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.7:update2a:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.7:u2:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.7:update2:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.7:u1b:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.7:update1b:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.7:u1:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.7:update1:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.7:u3g:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.7:update3g:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.7:u3b:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.7:update3b:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.7:u3j:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.7:update3j:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:7.0:u1:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:7.0:update1:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:7.0:u1a:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:7.0:update1a:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.7:u3f:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.7:update3f:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.5:u2g:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.5:update2g:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.5:u2d:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.5:update2d:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.5:u2c:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.5:update2c:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.5:u2b:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.5:update2b:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.5:u2:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.5:update2:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.5:u1g:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.5:update1g:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.5:u1e:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.5:update1e:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.5:u1d:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.5:update1d:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.5:u3f:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.5:update3f:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.5:u3k:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.5:update3k:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.5:u3d:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.5:update3d:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:vmware:vcenter_server:6.5:u3:*:*:*:*:*:* OR *cpe:2.3:a:vmware:vcenter_server:6.5:update3:*:*:*:*:*:*
  • Initial Analysis by [email protected]

    Mar. 04, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    Changed Reference Type https://www.vmware.com/security/advisories/VMSA-2021-0002.html No Types Assigned https://www.vmware.com/security/advisories/VMSA-2021-0002.html Vendor Advisory
    Added CWE NIST CWE-918
    Added CPE Configuration OR *cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:* versions from (including) 3.0 up to (excluding) 3.10.1.2 *cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:* versions from (including) 4.0 up to (excluding) 4.2 *cpe:2.3:a:vmware:vcenter_server:6.5:-:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:a:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:b:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:c:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:d:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:e:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:f:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:u1d:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:u1e:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:u1g:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:u2:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:u2b:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:u2c:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:u2d:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:u2g:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:u3:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:u3d:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:u3f:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.5:u3k:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:-:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:a:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:b:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:d:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:u1:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:u1b:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:u2:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:u2a:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:u2c:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:u3:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:u3a:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:u3b:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:u3f:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:u3g:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:6.7:u3j:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:-:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:a:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:b:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:c:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:d:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:u1:*:*:*:*:*:* *cpe:2.3:a:vmware:vcenter_server:7.0:u1a:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-21973 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-21973 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

13.99 }} -3.23%

score

0.95813

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: