CVE-2020-27632 Information

Description

In SIMATIC MV400 family versions prior to v7.0.6 the ISN generator is initialized with a constant value and has constant increments. An attacker could predict and hijack TCP sessions.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

https://cert-portal.siemens.com/productcert/pdf/ssa-599268.pdf

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5