XML External Entity injection in Mitsubishi Electric Hardware solutions

#VU54512 XML External Entity injection in Mitsubishi Electric Hardware solutions

Published: 2021-07-02

Vulnerability identifier: #VU54512

Vulnerability risk: High

CVSSv3.1: 8.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20595

CWE-ID: CWE-611

Exploitation vector: Network

Exploit availability: No

Vendor: Mitsubishi Electric

Description

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

The vulnerability exists due to insufficient validation of user-supplied XML input. A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or perform a denial of service (DoS) attack.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

G-50A: 3.35

GB-50A: 3.35

GB-24A: 9.11

AG-150A-A: 3.20

AG-150A-J: 3.20

GB-50ADA-A: 3.20

GB-50ADA-J: 3.20

EB-50GU-A: 7.09

EB-50GU-J: 7.09

AE-200A: 7.93

AE-200E: 7.93

AE-50A: 7.93

AE-50E: 7.93

EW-50A: 7.93

EW-50E: 7.93

TE-200A: 7.93

TE-50A: 7.93

TW-50A: 7.93

CMS-RMD-J: 1.30

PAC-YG50ECA: 2.20

BAC-HD150: 2.21

External links
http://ics-cert.us-cert.gov/advisories/icsa-21-182-05

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?

No. We are not aware of malware exploiting this vulnerability.

Latest bulletins with this vulnerability

Multiple vulnerabilities in Mitsubishi Electric Air Conditioning System