Description
Schneider Electric Modicon TM221CE16R 1.3.3.3 devices allow remote attackers to discover the application-protection password via a \x00\x01\x00\x00\x00\x05\x01\x5a\x00\x03\x00 request to the Modbus port (502/tcp). Subsequently the application may be arbitrarily downloaded, modified, and uploaded.
Advisories 1
- ICSA-17-103-02A Schneider Electric Modicon M221 PLCs and SoMachine Basic (Update A) CISA ICS & IT advisories · Jul 20, 2017