A Predictable Value Range from Previous Values issue exists 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 malicious user to predict the numbers from previous values. This may allow an malicious user to spoof or disrupt TCP connections.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
schneider-electric modicon_m241_firmware |
||
schneider-electric modicon_m251_firmware |
||
schneider-electric modicon_m221_firmware |
Vulmon