Multiple vulnerabilities in Dell PowerFlex Appliance

Published: 2022-10-20

Risk	Critical
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-21985 CVE-2021-21986
CWE-ID	CWE-20 CWE-287
Exploitation vector	Network
Public exploit	Vulnerability #1 is being exploited in the wild.
Vulnerable software Subscribe	PowerFlex Appliance Other software / Other software solutions
Vendor	Dell

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU53595

Risk: Critical

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2021-21985

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input within the Virtual SAN Health Check plug-in, which is enabled by default. A remote non-authenticated attacker can send a specially crafted HTTP request to the vSphere Client available at port 443/tcp and execute arbitrary commands with unrestricted privileges on the underlying operating system that hosts vCenter Server.

Mitigation

Install update from vendor's website.

Vulnerable software versions

PowerFlex Appliance: before Intelligent_Catalog_37_361_00_r14

External links

http://www.dell.com/support/kbdoc/en-us/000188318/dsa-2021-128-dell-emc-powerflex-appliance-security-update-for-vmware-vcenter-server-component-vulnerabilities

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

2) Improper Authentication

EUVDB-ID: #VU53596

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-21986

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No