CVE Vulnerability

CVE-2020-22552

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://sourceforge.net/projects/snap7/ Exploit Third Party Advisory
http://snap7.com Third Party Advisory
https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/ Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:snap7_project:snap7:1.4.1:*:*:*:*:*:*:*
Information

Published : 2020-10-28 02:15

Updated : 2020-11-03 02:13

NVD link : CVE-2020-22552

Mitre link : CVE-2020-22552

Products Affected
No products.
CWE
NVD-CWE-noinfo