SB2020011707 - Denial of service in Schneider Electric Modicon Controllers
Published: January 17, 2020
Security Bulletin ID
SB2020011707
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2019-6857)
CWE-ID: -
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper check for unusual or exceptional conditions. A remote attacker can cause a denial of service condition in the controller when reading specific memory blocks using Modbus TCP.
Remediation
Install update from vendor's website.