SB2019071509 - Buffer overflow in Schneider Electric Modicon Controllers

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Main Vulnerability Database SB2019071509

SB2019071509 - Buffer overflow in Schneider Electric Modicon Controllers

Published: July 15, 2019 Updated: October 3, 2019

Security Bulletin ID SB2019071509
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
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 1 vulnerability.


1) Buffer overflow (CVE-ID: CVE-2018-7838)

CWE-ID: CWE-119 - Memory corruption

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 cause a denial of service (DoS) on the target system.

The vulnerability exists due to a boundary error on the FTP service of the controller or the Ethernet BMENOC module when it receives a FTP CWD command with a data length greater than 1020 bytes. A power cycle is then needed to reactivate the FTP service. A remote attacker can trigger memory corruption and cause a denial of service.



Remediation

Install update from vendor's website.

References