#VU48363 Improper Check for Unusual or Exceptional Conditions


Published: 2020-11-11

Vulnerability identifier: #VU48363

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-7538

CWE-ID: CWE-754

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PLC Simulator for EcoStruxure Control Expert
Other software / Other software solutions
PLC Simulator for Unity Pro
Other software / Other software solutions
EcoStruxure Control Expert
Server applications / SCADA systems

Vendor: Schneider Electric

Description

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

The vulnerability exists due to improper input validation. A remote attacker can send a specially crafted request over Modbus and cause denial of service condition.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PLC Simulator for EcoStruxure Control Expert: All versions

PLC Simulator for Unity Pro: All versions

EcoStruxure Control Expert: All versions


External links
http://ics-cert.us-cert.gov/advisories/icsa-20-315-03


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