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CVE-2020-22552

7.5 · HIGH

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 cras…

Published Oct 28, 2020EPSS 1.47%

Overview

CVE-2020-22552 is a high-severity vulnerability. It was published on October 28, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refsourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/Refsourceforge.net/projects/snap7/Refsourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/Refsourceforge.net/projects/snap7/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-22552?

CVE-2020-22552 is a high-severity vulnerability. It was published on October 28, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2020-22552?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-22552?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-22552?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-22552 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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