CVE-2017-6030: medium-severity vulnerability in Schneider Electric Modicon M221
Schneider Electric Modicon PLCs Predictable Value Range from Previous Values
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 2.2%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Affected products
Schneider Electric · Modicon M221Schneider Electric · Modicon M241Schneider Electric · Modicon M251Related CVEs — Schneider Electric Modicon M221
In the same product, most dangerous first.