Riskcovery

CVE-2017-6030

Schneider Electric Modicon PLCs Predictable Value Range from Previous Values

State
Published
Severity
6.5 Medium
Published
Jun 30, 2017
Updated
Jun 4, 2026
Reserved
Feb 16, 2017

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
3.16.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:LCISA-ADP

Weaknesses

Affected Products

ProductVersions
Modicon M221Schneider Electric
  • before 1.5.0.0Affected
Modicon M241Schneider Electric
  • before 4.0.5.11Affected
Modicon M251Schneider Electric
  • before 4.0.5.11Affected

References

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