CVE-2021-20988
Hilscher rcX RTOS: Wrong handling of the UDP checksum
HIGH
7.5
CVSS Score
Published: May 13, 2021 at 01:45 PM UTC
Updated: June 17, 2026 at 03:34 AM UTC
17 products affected across 2 vendorsIce1-8di8do G60L V1D FirmwareIce1-16dio G60L C1-v1d FirmwarercX RTOS
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Severity
HIGH7.5
Exploit prediction
EPSS 1.0%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 2.1.14.1v < V2.1.14.1
Affected range stops below 2.1.14.1, so it looks safe — our inference, not a vendor statement
Affected range stops below V2.1.14.1, so it looks safe — our inference, not a vendor statement
v ≤ f10017
pepperl-fuchs-ice1-16di-g60l-v1d (same device)
v ≤ f10017
pepperl-fuchs-ice1-16dio-g60l-c1-v1d (same device)
v ≤ f10017
pepperl-fuchs-ice1-16dio-g60l-v1d (same device)
v ≤ f10017
pepperl-fuchs-ice1-8di8do-g60l-c1-v1d (same device)
v ≤ f10017
pepperl-fuchs-ice1-8di8do-g60l-v1d (same device)
v ≤ f10017
pepperl-fuchs-ice1-8iol-g30l-v1d (same device)
v ≤ f10017
pepperl-fuchs-ice1-8iol-g60l-v1d (same device)
v ≤ f10017
pepperl-fuchs-ice1-8iol-s2-g60l-v1d (same device)
ICE1-16DI-G60L-V1D ≤ v ≤ F10017ICE1-16DIO-G60L-C1-V1D ≤ v ≤ F10017ICE1-16DIO-G60L-V1D ≤ v ≤ F10017ICE1-16DI-G60L-V1DICE1-16DIO-G60L-C1-V1DICE1-16DIO-G60L-V1D
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://cert.vde.com/de-de/advisories/vde-2021-018x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checksumCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-119
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