CVE-2021-20988

Hilscher rcX RTOS: Wrong handling of the UDP checksum

Description

In Hilscher rcX RTOS versions prios to V2.1.14.1 the actual UDP packet length is not verified against the length indicated by the packet. This may lead to a denial of service of the affected device.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.28%
Vendor Advisory hilscher.com
Affected: Hilscher rcX RTOS
Affected: Pepperl+Fuchs Ethernet IO Modules ICE1-16
Affected: Pepperl+Fuchs Ethernet IO Modules ICE1-8
Published at:
Updated at:

References

Link Tags
https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checksum vendor advisory
https://cert.vde.com/de-de/advisories/vde-2021-018 third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-20988?
CVE-2021-20988 has been scored as a high severity vulnerability.
How to fix CVE-2021-20988?
To fix CVE-2021-20988, 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-2021-20988 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-20988 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-20988?
CVE-2021-20988 affects Hilscher rcX RTOS, Pepperl+Fuchs Ethernet IO Modules ICE1-16, Pepperl+Fuchs Ethernet IO Modules ICE1-8.
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