#VU21480 Improper Check for Unusual or Exceptional Conditions in BMXNOR0200H Ethernet / Serial RTU module


Published: 2019-10-02

Vulnerability identifier: #VU21480

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-2019-6831

CWE-ID: N/A

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
BMXNOR0200H Ethernet / Serial RTU module
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 an unusually high number of IEC 60870-5-104 packets to the module on port 2404/TCP, cause disconnection of active connections and perform a denial of service attack.


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

Vulnerable software versions

BMXNOR0200H Ethernet / Serial RTU module: All versions

External links
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.


Latest bulletins with this vulnerability


Multiple vulnerabilities in Schneider Electric Modicon Controllers