PT-2020-15480 · Snap7 · Snap7
CVSS v3.1
7.5
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Snap7 version 1.4.1
Description
The issue occurs when an attacker sends a crafted packet using the COTP protocol with the last-data-unit flag set to No, and the S7 function writes a variable. This results in the Snap7 server crashing.
Recommendations
For Snap7 version 1.4.1, consider disabling the var function in S7 writes to prevent the server from crashing until a patch is available.
Exploit
Fix
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Related Identifiers
Affected Products
Snap7