Out-of-bounds write in Schneider Electric products - CVE-2020-7563

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Main Vulnerability Database Vulnerabilities #VU49331

Out-of-bounds write in Schneider Electric products - CVE-2020-7563

Published: January 7, 2021


Vulnerability identifier: #VU49331
CSH Severity: Medium
CVSS v4: 8.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-7563
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when uploading a specially crafted file on the controller over FTP. A remote authenticated attacker can trigger out-of-bounds write and execute arbitrary code on the target system.

This vulnerability affects the following Modicon products:

  • M340 CPUs
    • BMX P34x, all versions
  • M340 Communication Ethernet modules
    • BMX NOE 0100 (H), all versions
    • BMX NOE 0110 (H), all versions
    • BMX NOC 0401, all versions
    • BMX NOR 0200H, all versions
  • Premium processors with integrated Ethernet COPRO
    • TSXP574634, TSXP575634, TSXP576634, all versions
  • Premium communication modules
    • TSXETY4103, all versions
    • TSXETY5103, all versions
  • Quantum processors with integrated Ethernet COPRO
    • 140CPU65xxxxx, all versions
  • Quantum communication modules
    • 140NOE771x1, all versions
    • 140NOC78x00, all versions
    • 140NOC77101, all versions



Affected software

BMX P34x
BMX NOE 0100 (H)
BMX NOE 0110 (H)
BMX NOC 0401
BMX NOR 0200H
TSXP574634
TSXP575634
TSXP576634
TSXETY4103
TSXETY5103
140CPU65xxxxx
140NOE771x1
140NOC78x00
140NOC77101

How to mitigate CVE-2020-7563

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


External References

Related Security Bulletins