Risk | Medium |
Patch available | NO |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-20591 |
CWE-ID | CWE-400 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
MELSEC iQ-R 00 CPU Hardware solutions / Firmware MELSEC iQ-R 01 CPU Hardware solutions / Firmware MELSEC iQ-R 02 CPU Hardware solutions / Firmware MELSEC iQ-R 04 (EN) CPU Hardware solutions / Firmware MELSEC iQ-R 08 (EN) CPU Hardware solutions / Firmware MELSEC iQ-R 16 (EN) CPU Hardware solutions / Firmware MELSEC iQ-R 32 (EN) CPU Hardware solutions / Firmware MELSEC iQ-R 120 (EN) CPU Hardware solutions / Firmware MELSEC iQ-R 08 SFCPU Hardware solutions / Firmware MELSEC iQ-R 16 SFCPU Hardware solutions / Firmware MELSEC iQ-R 32 SFCPU Hardware solutions / Firmware MELSEC iQ-R 120 SFCPU Hardware solutions / Firmware MELSEC iQ-R 32 PCPU Hardware solutions / Firmware MELSEC iQ-R 16 PCPU Hardware solutions / Firmware MELSEC iQ-R 08 PCPU Hardware solutions / Firmware MELSEC iQ-R 120 PSFCPU Hardware solutions / Firmware MELSEC iQ-R 32 PSFCPU Hardware solutions / Firmware MELSEC iQ-R 16 PSFCPU Hardware solutions / Firmware MELSEC iQ-R 08 PSFCPU Hardware solutions / Firmware |
Vendor | Mitsubishi Electric |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU53639
Risk: Medium
CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:C]
CVE-ID: CVE-2021-20591
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper session management. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsMELSEC iQ-R 00 CPU: All versions
MELSEC iQ-R 01 CPU: All versions
MELSEC iQ-R 02 CPU: All versions
MELSEC iQ-R 04 (EN) CPU: All versions
MELSEC iQ-R 08 (EN) CPU: All versions
MELSEC iQ-R 16 (EN) CPU: All versions
MELSEC iQ-R 32 (EN) CPU: All versions
MELSEC iQ-R 120 (EN) CPU: All 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 32 PCPU: All versions
MELSEC iQ-R 16 PCPU: All versions
MELSEC iQ-R 08 PCPU: All versions
MELSEC iQ-R 120 PSFCPU: All versions
MELSEC iQ-R 32 PSFCPU: All versions
MELSEC iQ-R 16 PSFCPU: All versions
MELSEC iQ-R 08 PSFCPU: All versions
External linkshttp://ics-cert.us-cert.gov/advisories/icsa-21-147-05
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.