Schneider Electric Modicon Modbus Protocol Authentication Bypass by Capture-replay

An authentication bypass by capture-replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download.

A Violation of Secure Design Principles issue was discovered in Schneider Electric Modicon Modbus Protocol. The Modicon Modbus protocol has a session-related weakness making it susceptible to brute-force attacks.

Multiple stack-based buffer overflows in ModbusDrv.exe in Schneider Electric Modbus Serial Driver 1.10 through 3.2 allow remote attackers to execute arbitrary code via a large buffer-size value in a Modbus Application Header.

Improper Privilege Management vulnerability exists in Schneider Electric Modbus Serial Driver (see security notification for versions) which could cause local privilege escalation when the Modbus Serial Driver service is invoked. The driver does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

An Externally Controlled Reference to a Resource (CWE-610) vulnerability exists in Schneider Electric Modbus Serial Driver (For 64-bit Windows OS:V3.17 IE 37 and prior , For 32-bit Windows OS:V2.17 IE 27 and prior, and as part of the Driver Suite version:V14.12 and prior) which could allow write access to system files available only to users with SYSTEM privilege or other important user files.