Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 59.4%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 6.4
References
Products affected by CVE-2017-6030
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cpe:2.3:h:schneider-electric:modicon_m221:-
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cpe:2.3:h:schneider-electric:modicon_m241:-
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cpe:2.3:h:schneider-electric:modicon_m251:-
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cpe:2.3:o:schneider-electric:modicon_m221_firmware:-
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cpe:2.3:o:schneider-electric:modicon_m221_firmware:1.1.1.5
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cpe:2.3:o:schneider-electric:modicon_m241_firmware:-
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cpe:2.3:o:schneider-electric:modicon_m241_firmware:4.0.3.20
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cpe:2.3:o:schneider-electric:modicon_m251_firmware:-
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cpe:2.3:o:schneider-electric:modicon_m251_firmware:4.0.3.20