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CVE-2017-6030

Schneider Electric Modicon PLCs Predictable Value Range from Previous Values

Published: Jun 30, 2017Updated: Jun 4, 2026 Sources: CVE List NVD csafCWE-343
6.5MEDIUM
NVD MITRE
EPSS Score
2.1%
Top 18.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-343CWE-331

Affected Products

schneider-electric
commercial·FRaka schneider electric se
modicon m241 firmware
ICS / OT / IoT
modicon m251 firmware
ICS / OT / IoT
modicon m221 firmware
ICS / OT / IoT
Schneider Electric
commercial·FRaka schneider-electric
Modicon M221
ICS / OT / IoT
Modicon M241
ICS / OT / IoT
Modicon M251
ICS / OT / IoT

Exploitability

Official Patch Available

References

http://www.securityfocus.com/bid/97254
securityfocus.com
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2017/icsa-17-089-02.json
github.com
https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02
ics-cert.us-cert.gov
and 8 more references View all →

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