CVEvulnerability

CVE-2017-6030

6.5 MEDIUM Published 2017-06-30 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2017-06-30
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS 2.0 ([email protected])
6.4 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:P
Weaknesses
CWE-331, CWE-343

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.

Affected configurations

• schneider-electric modicon m241 firmware (<= 4.0.3.20) • schneider-electric modicon m251 firmware (<= 4.0.3.20) • schneider-electric modicon m221 firmware (<= 1.1.1.5)

Related

Weakness · CWE (2)

  • CWE-331 Insufficient Entropy weakness
  • CWE-343 Predictable Value Range from Previous Values weakness

References