#VU58466 Input validation error in Mitsubishi Electric products - CVE-2021-20611

Vulnerability identifier: #VU58466

Vulnerability risk: Medium

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

CVE-ID: CVE-2021-20611

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
MELSEC iQ-R 00 CPU
MELSEC iQ-R 01 CPU
MELSEC iQ-R 02 CPU
MELSEC iQ-Q 172 DCPU-S1
MELSEC iQ-R 120 PCPU
MELSEC iQ-R 32 PCPU
MELSEC iQ-R 16 PCPU
MELSEC iQ-R 08 PCPU
MELSEC iQ-Q 100 UDEHCPU
MELSEC iQ-Q 50 UDEHCPU
MELSEC iQ-Q 26 UDEHCPU
MELSEC iQ-Q 20 UDEHCPU
MELSEC iQ-Q 13 UDEHCPU
MELSEC iQ-Q 10 UDEHCPU
MELSEC iQ-Q 06 UDEHCPU
MELSEC iQ-Q 04 UDEHCPU
MELSEC iQ-R 04 (EN) CPU
MELSEC iQ-R 08 (EN) CPU
MELSEC iQ-R 16 (EN) CPU
MELSEC iQ-R 32 (EN) CPU
MELSEC iQ-R 120 (EN) CPU
MELSEC iQ-R 120 SFCPU
MELSEC iQ-R 32 SFCPU
MELSEC iQ-R 16 SFCPU
MELSEC iQ-R 08 SFCPU
MELSEC iQ-R 120 PSFCPU
MELSEC iQ-R 32 PSFCPU
MELSEC iQ-R 16 PSFCPU
MELSEC iQ-R 08 PSFCPU
MELSEC iQ-R 64 MTCPU
MELSEC iQ-R 32 MTCPU
MELSEC iQ-R 16 MTCPU
MELSEC iQ-Q 26 UDVCPU
MELSEC iQ-Q 13 UDVCPU
MELSEC iQ-Q 06 UDVCPU
MELSEC iQ-Q 04 UDVCPU
MELSEC iQ-Q 03 UDVCPU
MELSEC iQ-Q 26 UDPVCPU
MELSEC iQ-Q 13 UDPVCPU
MELSEC iQ-Q 06 UDPVCPU
MELSEC iQ-Q 04 UDPVCPU
MELSEC Q Series Q12DCCPU-V
MELSEC Q Series Q24DHCCPU-V(G)
MELSEC Q Series Q24/26DHCCPU-LS
MELSEC iQ-Q MR-MQ100
MELSEC Q Series Q172 DCPU-S1
MELSEC Q Series Q173DCPU-S1
MELSEC iQ-Q 173 DSCPU
MELSEC iQ-Q 172 DSCPU
MELSEC Q Series Q170MCPU
MELSEC Q Series Q170MSCPU(-S1)
MELSEC L Series L26CPU-(P)BT
MELSEC L Series L26CPU(-P)
MELSEC L Series L06(-P)
MELSEC L Series L02(-P)
MELIPC Series MI5122-VW
MELSEC-Q Q03UDECPU
MELSEC iQ-R Series C R12CCPU-V

Software vendor:
Mitsubishi Electric

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Install updates from vendor's website.

• https://ics-cert.us-cert.gov/advisories/icsa-21-334-02
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-019_en.pdf