CVE-2021-20988 — HIGH (8.6)

Q: What is CVE-2021-20988?

CVE-2021-20988 is a vulnerability with a CVSS score of 8.6 (HIGH). 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.

Q: How severe is CVE-2021-20988?

CVE-2021-20988 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-20988?

Check the references section above for vendor advisories and patch information. Affected products include: Hilscher Rcx Rtos, Pepperl-Fuchs Ice1-16Di-G60L-V1D Firmware, Pepperl-Fuchs Ice1-16Di-G60L-V1D, Pepperl-Fuchs Ice1-16Dio-G60L-C1-V1D Firmware, Pepperl-Fuchs Ice1-16Dio-G60L-C1-V1D.

Vulnerability 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.

CVSS Score

8.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Hilscher	Rcx Rtos	< 2.1.14.1
Pepperl-Fuchs	Ice1-16Di-G60L-V1D Firmware	<= f10017
Pepperl-Fuchs	Ice1-16Di-G60L-V1D	-
Pepperl-Fuchs	Ice1-16Dio-G60L-C1-V1D Firmware	<= f10017
Pepperl-Fuchs	Ice1-16Dio-G60L-C1-V1D	-
Pepperl-Fuchs	Ice1-16Dio-G60L-V1D Firmware	<= f10017
Pepperl-Fuchs	Ice1-16Dio-G60L-V1D	-
Pepperl-Fuchs	Ice1-8Di8Do-G60L-C1-V1D Firmware	<= f10017
Pepperl-Fuchs	Ice1-8Di8Do-G60L-C1-V1D	-
Pepperl-Fuchs	Ice1-8Di8Do-G60L-V1D Firmware	<= f10017
Pepperl-Fuchs	Ice1-8Di8Do-G60L-V1D	-
Pepperl-Fuchs	Ice1-8Iol-G30L-V1D Firmware	<= f10017
Pepperl-Fuchs	Ice1-8Iol-G30L-V1D	-
Pepperl-Fuchs	Ice1-8Iol-G60L-V1D Firmware	<= f10017
Pepperl-Fuchs	Ice1-8Iol-G60L-V1D	-
Pepperl-Fuchs	Ice1-8Iol-S2-G60L-V1D Firmware	<= f10017
Pepperl-Fuchs	Ice1-8Iol-S2-G60L-V1D	-

Related Weaknesses (CWE)

CWE-119

References

https://cert.vde.com/de-de/advisories/vde-2021-018Third Party Advisory
https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checksVendor Advisory
https://cert.vde.com/de-de/advisories/vde-2021-018Third Party Advisory
https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checksVendor Advisory

FAQ

What is CVE-2021-20988?

CVE-2021-20988 is a vulnerability with a CVSS score of 8.6 (HIGH). 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.

How severe is CVE-2021-20988?

CVE-2021-20988 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-20988?

Check the references section above for vendor advisories and patch information. Affected products include: Hilscher Rcx Rtos, Pepperl-Fuchs Ice1-16Di-G60L-V1D Firmware, Pepperl-Fuchs Ice1-16Di-G60L-V1D, Pepperl-Fuchs Ice1-16Dio-G60L-C1-V1D Firmware, Pepperl-Fuchs Ice1-16Dio-G60L-C1-V1D.