CVE-2020-22552

Public Exploit

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.

7.5

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.16%

Third-Party Advisory snap7.com Third-Party Advisory sourceforge.net Third-Party Advisory sourceforge.net

Affected: n/a n/a

References

Link	Tags
http://snap7.com	third party advisory url repurposed
https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/	third party advisory
https://sourceforge.net/projects/snap7/	third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2020-22552?: CVE-2020-22552 has been scored as a high severity vulnerability.
How to fix CVE-2020-22552?: To fix CVE-2020-22552, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-22552 being actively exploited in the wild?: It is possible that CVE-2020-22552 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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