#VU72729 Out-of-bounds read in Kostac PLC Programming Software - CVE-2023-22421

Vulnerability identifier: #VU72729

Vulnerability risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-22421

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Kostac PLC Programming Software
Client/Desktop applications / Other client software

Vendor: JTEKT ELECTRONICS CORPORATION

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in the PLC program instructions. A remote attacker can create a specially crafted project file, trick the victim into opening it, trigger an out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Kostac PLC Programming Software: 1.6.9.0

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External links
https://jvn.jp/en/vu/JVNVU94966432/index.html

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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.