Vulnerability Details : CVE-2021-20593
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.
Vulnerability category: BypassGain privilege
Products affected by CVE-2021-20593
- cpe:2.3:o:mitsubishi:g-50a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:gb-50a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:ag-150a-a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:ag-150a-j_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:gb-50ada-a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:gb-50ada-j_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:eb-50gu-a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:eb-50gu-j_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:ae-200a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:ae-200e_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:ae-50a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:ae-50e_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:ew-50a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:ew-50e_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:te-200a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:te-50a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:tw-50a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:cms-rmd-j_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:mitsubishi:pac-yg50eca_firmware:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20593
0.09%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 37 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20593
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:P/A:N |
8.0
|
4.9
|
NIST | |
|
7.1
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N |
2.8
|
4.2
|
NIST |
CWE ids for CVE-2021-20593
-
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-20593
-
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-004_en.pdf
Vendor Advisory
-
https://jvn.jp/vu/JVNVU96046575/index.html
JVNVU#96046575: 三菱電機製空調管理システムの WEB 機能における認証アルゴリズムの不適切な実装に関する脆弱性Third Party Advisory
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