SB2020011706 - Multiple vulnerabilities in Schneider Electric Modicon Controllers

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Main Vulnerability Database SB2020011706

SB2020011706 - Multiple vulnerabilities in Schneider Electric Modicon Controllers

Published: January 17, 2020

Security Bulletin ID SB2020011706
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2018-7794)

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 when reading data with invalid index using Modbus TCP.


2) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2019-6856)

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 when writing specific physical memory blocks using Modbus TCP.


Remediation

Install update from vendor's website.

References