Vulnerability identifier: #VU21479

Vulnerability risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-6813

CWE-ID: N/A

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
BMXNOR0200H Ethernet / Serial RTU module
Hardware solutions / Firmware
Modicon M340
Hardware solutions / Firmware

Vendor: Schneider Electric

Description
The vulnerability allows a remote attacker to cause a denial of service (DoS) condition.

The vulnerability exits due to the affected software does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the software. A remote attacker can send a specially crafted truncated SNMP packets to the port 161/UDP on the affected device and cause a denial of service condition.

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

Vulnerable software versions

BMXNOR0200H Ethernet / Serial RTU module: All versions

Modicon M340: All versions

---

External links
http://www.schneider-electric.com/en/download/document/SEVD-2019-225-02/
http://www.schneider-electric.com/en/download/document/SEVD-2019-225-03/

---

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.