Fortinet Discovers Schneider Electric Modicon Embedded HTTP Server Stack Buffer Overflow Vulnerability
Fortinet's FortiGuard Labs has discovered a stack-based buffer overflow vulnerability in Schneider Electric Modicon products.
The Modicon PLC (Programmable Logic Controllers) control and monitor industrial operations in a sustainable, flexible, efficient and protected way.
A stack-based buffer overflow (Buffer Copy without Checking Size of Input) vulnerability exists which could cause write access and the execution of commands by uploading a specially crafted file on the controller over FTP.
SolutionsFortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:
Released Nov 04, 2020
Users should apply the solution/workaround provided by Schneider Electric.
Fortinet reported the vulnerability to Schneider Electric on Aug 11, 2020.
Schneider Electric confirmed the vulnerability on Oct 13, 2020.
Schneider Electric provided remediation on Nov 12, 2020.