CVE-2020-7559

Public Exploit

Description

A CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause a crash of the PLC simulator present in EcoStruxureª Control Expert software when receiving a specially crafted request over Modbus.

References

Link	Tags
https://www.se.com/ww/en/download/document/SEVD-2020-315-07	product patch vendor advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1140	third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2020-7559?: CVE-2020-7559 has been scored as a high severity vulnerability.
How to fix CVE-2020-7559?: To fix CVE-2020-7559, 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-2020-7559 being actively exploited in the wild?: It is possible that CVE-2020-7559 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-7559?: CVE-2020-7559 affects n/a PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) .

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Description

Category

CWE-120 – Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

References

Frequently Asked Questions