Multiple vulnerability in Mitsubishi Electric MELSEC iQ-R Series

1) Information disclosure

EUVDB-ID: #VU56389

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-20594

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote attacker can perform a brute-force attack and gain unauthorized access to sensitive information on the system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

MELSEC iQ-R 08 SFCPU: All versions

MELSEC iQ-R 16 SFCPU: All versions

MELSEC iQ-R 32 SFCPU: All versions

MELSEC iQ-R 120 SFCPU: All versions

MELSEC iQ-R 08 PSFCPU: All versions

MELSEC iQ-R 16 PSFCPU: All versions

MELSEC iQ-R 32 PSFCPU: All versions

MELSEC iQ-R 120 PSFCPU: All versions

CPE2.3

• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_08_sfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_16_sfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_32_sfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_120_sfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_08_psfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_16_psfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_32_psfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_120_psfcpu:*:*:*:*:*:*:*:*

External links

https://jvn.jp/vu/JVNVU98578731/index.html
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-008_en.pdf

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.

2) Insufficiently protected credentials

EUVDB-ID: #VU56390

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-20597

CWE-ID: CWE-522 - Insufficiently Protected Credentials

Exploit availability: No

Description

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

The vulnerability exists due to insufficiently protected credentials. A remote attacker can obtain unprotected credentials by sniffing network traffic.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

MELSEC iQ-R 08 SFCPU: All versions

MELSEC iQ-R 16 SFCPU: All versions

MELSEC iQ-R 32 SFCPU: All versions

MELSEC iQ-R 120 SFCPU: All versions

MELSEC iQ-R 08 PSFCPU: All versions

MELSEC iQ-R 16 PSFCPU: All versions

MELSEC iQ-R 32 PSFCPU: All versions

MELSEC iQ-R 120 PSFCPU: All versions

CPE2.3

• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_08_sfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_16_sfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_32_sfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_120_sfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_08_psfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_16_psfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_32_psfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_120_psfcpu:*:*:*:*:*:*:*:*

External links

https://jvn.jp/vu/JVNVU98578731/index.html
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-008_en.pdf

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.

3) Overly Restrictive Account Lockout Mechanism

EUVDB-ID: #VU56391

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-20598

CWE-ID: CWE-645 - Overly Restrictive Account Lockout Mechanism

Exploit availability: No

Description

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

The vulnerability exists due to overly restrictive account lockout mechanism. A remote attacker can lock out a legitimate user by continually attempting to login with a known username and incorrect passwords.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

MELSEC iQ-R 08 SFCPU: All versions

MELSEC iQ-R 16 SFCPU: All versions

MELSEC iQ-R 32 SFCPU: All versions

MELSEC iQ-R 120 SFCPU: All versions

MELSEC iQ-R 08 PSFCPU: All versions

MELSEC iQ-R 16 PSFCPU: All versions

MELSEC iQ-R 32 PSFCPU: All versions

MELSEC iQ-R 120 PSFCPU: All versions

CPE2.3

• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_08_sfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_16_sfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_32_sfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_120_sfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_08_psfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_16_psfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_32_psfcpu:*:*:*:*:*:*:*:*
• cpe:2.3:h:mitsubishi_electric:melsec_iq-r_120_psfcpu:*:*:*:*:*:*:*:*

External links

https://jvn.jp/vu/JVNVU98578731/index.html
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-008_en.pdf

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.