CVE-2017-6030

A predictable value range from previous values issue was discovered in Schneider Electric Modicon PLCs Modicon M221, firmware versions prior to Version 1.5.0.0, Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11. The affected products generate insufficiently random TCP initial sequence numbers that may allow an attacker to predict the numbers from previous values. This may allow an attacker to spoof or disrupt TCP connections.

A predictable value range from previous values issue was discovered in Schneider Electric Modicon PLCs Modicon M221, firmware versions prior to Version 1.5.0.0, Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11. The affected products generate insufficiently random TCP initial sequence numbers that may allow an attacker to predict the numbers from previous values. This may allow an attacker to spoof or disrupt TCP connections.

Un problema de Rango de Valor Predecible de Valores Anteriores fue detectado en PLCs Modicon M221, versiones de firmware anteriores a 1.5.0.0, Modicon M241, versiones de firmware anteriores a la 4.0.5.11, y Modicon M251, versiones de firmware anteriores a la 4.0.5.11 de Schneider Electric. Los productos afectados generan números de secuencia inicial TCP de aleatoriedad insuficientemente que pueden permitir a un atacante predecir los números de los valores anteriores. Esto puede permitir a un atacante suplantar o interrumpir las conexiones TCP.