Vulnerability identifier: #VU22580

Vulnerability risk: Medium

CVSSv3.1: 4.5 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-6841

CWE-ID: CWE-248

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Modicon M580
Hardware solutions / Firmware
Modicon M340
Hardware solutions / Firmware
Modicon BMxCRA modules
Hardware solutions / Firmware
Modicon 140CRA modules
Hardware solutions / Firmware

Vendor: Schneider Electric

Description

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 firmware with no firmware image inside the package using FTP protocol. A remote authenticated administrator can cause a denial of service condition on the PLC.

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

Vulnerable software versions

Modicon M580: All versions

Modicon M340: All versions

Modicon BMxCRA modules: All versions

Modicon 140CRA modules: All versions

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External links
http://www.schneider-electric.com/ww/en/download/document/SEVD-2019-281-02

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.