CVE-2021-20592

05.08.2021, 21:15

Missing synchronization vulnerability in GOT2000 series GT27 model communication driver versions 01.19.000 through 01.39.010, GT25 model communication driver versions 01.19.000 through 01.39.010 and GT23 model communication driver versions 01.19.000 through 01.39.010 and GT SoftGOT2000 versions 1.170C through 1.256S allows a remote unauthenticated attacker to cause DoS condition on the MODBUS/TCP slave communication function of the products by rapidly and repeatedly connecting and disconnecting to and from the MODBUS/TCP communication port on a target. Restart or reset is required to recover.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Mitsubishi	CNA	---				---
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 59%

Vendor	Product	Version
mitsubishielectric	gt_softgot2000	1.170c ≤ 𝑥 ≤ 1.256s
mitsubishielectric	got2000_gt27_firmware	01.19.000 ≤ 𝑥 ≤ 01.39.010
mitsubishielectric	got2000_gt25_firmware	01.19.000 ≤ 𝑥 ≤ 01.39.010
mitsubishielectric	got2000_gt23_firmware	01.19.000 ≤ 𝑥 ≤ 01.39.010

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-662 - Improper Synchronization
The software utilizes multiple threads or processes to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes.

References

https://jvn.jp/vu/JVNVU92414172/index.html

https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-007_en.pdf

https://jvn.jp/vu/JVNVU92414172/index.html

https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-007_en.pdf