CVE-2021-20988

moderate-risk
Published 2021-05-13

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.

Do I need to act?

-
0.28% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.6/10 High
NETWORK / LOW complexity

Affected Products (9)

Rcx Rtos
Ice1-16Di-G60L-V1D Firmware
Ice1-16Dio-G60L-C1-V1D Firmware
Ice1-16Dio-G60L-V1D Firmware
Ice1-8Di8Do-G60L-C1-V1D Firmware
Ice1-8Di8Do-G60L-V1D Firmware
Ice1-8Iol-G30L-V1D Firmware
Ice1-8Iol-G60L-V1D Firmware
Ice1-8Iol-S2-G60L-V1D Firmware

Affected Vendors

Pepperl-Fuchs Hilscher

References (4)

Third Party Advisory https://cert.vde.com/de-de/advisories/vde-2021-018
Vendor Advisory https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checks...
Third Party Advisory https://cert.vde.com/de-de/advisories/vde-2021-018
Vendor Advisory https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checks...
45
/ 100
moderate-risk
Severity 29/34 · Critical
Exploitability 1/34 · Minimal
Exposure 15/34 · Moderate