PT-2021-14068 · Mitsubishi · Melsec Iq-R Series C Controller Module R12Ccpu-V

CVE-2021-20600 · Published 2021-10-08 · Updated 2023-05-16

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions: Mitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V versions 16 and prior

Description: The issue allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending a large number of packets in a short time while the module is starting up. A system reset is required for recovery.

Recommendations: For versions 16 and prior, to resolve the issue, update to a version later than 16. As a temporary workaround, consider restricting access to the module during startup to minimize the risk of exploitation.

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2021-20600

Affected Products

Melsec Iq-R Series C Controller Module R12Ccpu-V

References · 6

• https://osv.dev/vulnerability/CVE-2021-20600 · Vendor Advisory
• https://mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-015_en.pdf · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-20600 · Security Note
• https://jvn.jp/vu/JVNVU94914666/index.html · Note
• https://t.me/cibsecurity/30267 · Telegram Post
• https://us-cert.cisa.gov/ics/advisories/icsa-21-280-04 · Note