CVEvulnerability

CVE-2020-22552

7.5 HIGH Published 2020-10-28 Modified 2026-07-09 Official page ↗
Status
Modified
Published
2020-10-28
Last modified
2026-07-09
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P

Description

The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed.

Affected configurations

• snap7 project snap7 1.4.1

References