Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-20593

Severity CVSS v4.0:
Pending analysis
Type:
CWE-287 Authentication Issues
Publication date:
13/07/2021
Last modified:
05/08/2021

Description

Incorrect Implementation of Authentication Algorithm in Mitsubishi Electric Air Conditioning System/Centralized Controllers (G-50A Ver.2.50 to Ver. 3.35, GB-50A Ver.2.50 to Ver. 3.35, AG-150A-A Ver.3.20 and prior, AG-150A-J Ver.3.20 and prior, GB-50ADA-A Ver.3.20 and prior, GB-50ADA-J Ver.3.20 and prior, EB-50GU-A Ver 7.09 and prior, EB-50GU-J Ver 7.09 and prior, AE-200A Ver 7.93 and prior, AE-200E Ver 7.93 and prior, AE-50A Ver 7.93 and prior, AE-50E Ver 7.93 and prior, EW-50A Ver 7.93 and prior, EW-50E Ver 7.93 and prior, TE-200A Ver 7.93 and prior, TE-50A Ver 7.93 and prior, TW-50A Ver 7.93 and prior, CMS-RMD-J Ver.1.30 and prior) and Air Conditioning System/Expansion Controllers (PAC-YG50ECA Ver.2.20 and prior) allows a remote authenticated attacker to impersonate administrators to disclose configuration information of the air conditioning system and tamper information (e.g. operation information and configuration of air conditioning system) by exploiting this vulnerability.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): High
Availability (A): None

Base Score 3.x
7.10
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:S/C:P/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: AV:N/AC:L/Au:S/C:P/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): Single
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): None

Base Score 2.0
5.50
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:mitsubishi:g-50a_firmware:*:*:*:*:*:*:*:* 2.50 (including) 3.35 (including)
cpe:2.3:h:mitsubishi:g-50a:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishi:gb-50a_firmware:*:*:*:*:*:*:*:* 2.50 (including) 3.35 (including)
cpe:2.3:h:mitsubishi:gb-50a:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishi:ag-150a-a_firmware:*:*:*:*:*:*:*:* 3.20 (including)
cpe:2.3:h:mitsubishi:ag-150a-a:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishi:ag-150a-j_firmware:*:*:*:*:*:*:*:* 3.20 (including)
cpe:2.3:h:mitsubishi:ag-150a-j:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishi:gb-50ada-a_firmware:*:*:*:*:*:*:*:* 3.20 (including)
cpe:2.3:h:mitsubishi:gb-50ada-a:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishi:gb-50ada-j_firmware:*:*:*:*:*:*:*:* 3.20 (including)
cpe:2.3:h:mitsubishi:gb-50ada-j:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishi:eb-50gu-a_firmware:*:*:*:*:*:*:*:* 7.09 (including)
cpe:2.3:h:mitsubishi:eb-50gu-a:-:*:*:*:*:*:*:*
cpe:2.3:o:mitsubishi:eb-50gu-j_firmware:*:*:*:*:*:*:*:* 7.09 (including)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools