PT-2021-17465 · Jtekt · Toyopuc Plc

Chris Yang · Published 2021-07-01 · Updated 2022-10-07 · CVE-2021-27477

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions JTEKT Corporation TOYOPUC PLC versions PC10G-CPU, 2PORT-EFR, Plus CPU, Plus EX, Plus EX2, Plus EFR, Plus EFR2, Plus 2P-EFR, PC10P-DP, PC10P-DP-IO, Plus BUS-EX, Nano 10GX, Nano 2ET, PC10PE, PC10PE-16/16P, PC10E, FL/ET-T-V2H, PC10B, PC10B-P, Nano CPU, PC10P, and PC10GE

Description When the affected products receive an invalid frame, the outside area of a receive buffer for FL-net are overwritten. As a result, the PLC CPU detects a system error, and the affected products stop.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-119

CWE-787

Related Identifiers

CVE-2021-27477

Affected Products

Toyopuc Plc

References · 4

• https://osv.dev/vulnerability/CVE-2021-27477 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27477 · Security Note
• https://t.me/cibsecurity/25858 · Telegram Post
• https://us-cert.cisa.gov/ics/advisories/icsa-21-180-04 · Note