CVE-2020-22552 Information

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.

CVSS Vector

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

Reference

http://snap7.com https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/ https://sourceforge.net/projects/snap7/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5