CVE-2021-20593
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.
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mitsubishi g-50a_firmware | 2.50 ≤ v ≤ 3.35 | — |
| mitsubishi gb-50a_firmware | 2.50 ≤ v ≤ 3.35 | — |
| mitsubishi ag-150a-a_firmware | v ≤ 3.20 | — |
| mitsubishi ag-150a-j_firmware | v ≤ 3.20 | — |
| mitsubishi gb-50ada-a_firmware | v ≤ 3.20 | — |
| mitsubishi gb-50ada-j_firmware | v ≤ 3.20 | — |
| mitsubishi eb-50gu-a_firmware | v ≤ 7.09 | — |
| mitsubishi eb-50gu-j_firmware | v ≤ 7.09 | — |
| mitsubishi ae-200a_firmware | v ≤ 7.93 | — |
| mitsubishi ae-200e_firmware | v ≤ 7.93 | — |
| mitsubishi ae-50a_firmware | v ≤ 7.93 | — |
| mitsubishi ae-50e_firmware | v ≤ 7.93 | — |
| mitsubishi ew-50a_firmware | v ≤ 7.93 | — |
| mitsubishi ew-50e_firmware | v ≤ 7.93 | — |
| mitsubishi te-200a_firmware | v ≤ 7.93 | — |
| mitsubishi te-50a_firmware | v ≤ 7.93 | — |
| mitsubishi tw-50a_firmware | v ≤ 7.93 | — |
| mitsubishi cms-rmd-j_firmware | v ≤ 1.30 | — |
| mitsubishi pac-yg50eca_firmware | v ≤ 2.20 | — |
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