Unauthorized File Read Vulnerability in vSphere Web Client from VMware
CVE-2021-21980

7.5HIGH

Key Information:

Vendor

Vmware
Status
Vmware Vcenter Server And Vmware Cloud Foundation
Vendor
CVE Published:
24 November 2021

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-21980?

The vSphere Web Client (FLEX/Flash) suffers from a vulnerability that allows an unauthorized file read. This weakness comes from improper access controls, permitting a malicious actor with network access to port 443 on vCenter Server to exploit the vulnerability. By leveraging this flaw, attackers may potentially access sensitive information, which poses a significant risk to the security of the affected systems.

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Affected Version(s)

VMware vCenter Server and VMware Cloud Foundation VMware vCenter Server (6.7 before 6.7 U3p and 6.5 before 6.5 U3r) and VMware Cloud Foundation 3.x

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

westone-CVE-2021-21980-scanner
Created by Osyanina

vcenter-cve-2021-21980-lab
Created by pratikjojode

References

https://www.vmware.com/security/advisories/VMSA-2021-0027...
x_refsource_MISC

EPSS Score

8% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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