#VU22582 Uncaught Exception in Schneider Electric products - CVE-2019-6843

Vulnerability identifier: #VU22582

Vulnerability risk: Medium

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

CVE-ID: CVE-2019-6843

CWE-ID: CWE-248

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Modicon M340
Modicon M580
Modicon BMxCRA modules
Modicon 140CRA modules

Software vendor:
Schneider Electric

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to uncaught exception vulnerability when upgrading the controller with an empty firmware package using FTP protocol. A remote authenticated administrator can cause a denial of service condition on the PLC.

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

• https://www.schneider-electric.com/ww/en/download/document/SEVD-2019-281-02