Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mitsubishi | G-50A Firmware | >= 2.50, <= 3.35 |
| Mitsubishi | G-50A | - |
| Mitsubishi | Gb-50A Firmware | >= 2.50, <= 3.35 |
| Mitsubishi | Gb-50A | - |
| Mitsubishi | Ag-150A-A Firmware | <= 3.20 |
| Mitsubishi | Ag-150A-A | - |
| Mitsubishi | Ag-150A-J Firmware | <= 3.20 |
| Mitsubishi | Ag-150A-J | - |
| Mitsubishi | Gb-50Ada-A Firmware | <= 3.20 |
| Mitsubishi | Gb-50Ada-A | - |
| Mitsubishi | Gb-50Ada-J Firmware | <= 3.20 |
| Mitsubishi | Gb-50Ada-J | - |
| Mitsubishi | Eb-50Gu-A Firmware | <= 7.09 |
| Mitsubishi | Eb-50Gu-A | - |
| Mitsubishi | Eb-50Gu-J Firmware | <= 7.09 |
| Mitsubishi | Eb-50Gu-J | - |
| Mitsubishi | Ae-200A Firmware | <= 7.93 |
| Mitsubishi | Ae-200A | - |
| Mitsubishi | Ae-200E Firmware | <= 7.93 |
| Mitsubishi | Ae-200E | - |
Related Weaknesses (CWE)
References
- https://jvn.jp/vu/JVNVU96046575/index.htmlThird Party Advisory
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-004_en.pdfVendor Advisory
- https://jvn.jp/vu/JVNVU96046575/index.htmlThird Party Advisory
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-004_en.pdfVendor Advisory
FAQ
What is CVE-2021-20593?
CVE-2021-20593 is a vulnerability with a CVSS score of 7.1 (HIGH). 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....
How severe is CVE-2021-20593?
CVE-2021-20593 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-20593?
Check the references section above for vendor advisories and patch information. Affected products include: Mitsubishi G-50A Firmware, Mitsubishi G-50A, Mitsubishi Gb-50A Firmware, Mitsubishi Gb-50A, Mitsubishi Ag-150A-A Firmware.