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[email protected]CVE-2021-20988

HistoryMay 13, 2021 - 2:15 p.m.

CVE-2021-20988

2021-05-1314:15:17

CWE-119

[email protected]

web.nvd.nist.gov

hilscher

rcx rtos

udp

denial of service

cve-2021-20988

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.3 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

45.8%

JSON

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 configurations

NVD

Node

hilscherrcx_rtosRange<2.1.14.1

Node

pepperl-fuchsice1-16di-g60l-v1d_firmwareRange≤f10017

AND

pepperl-fuchsice1-16di-g60l-v1dMatch-

Node

pepperl-fuchsice1-16dio-g60l-c1-v1d_firmwareRange≤f10017

AND

pepperl-fuchsice1-16dio-g60l-c1-v1dMatch-

Node

pepperl-fuchsice1-16dio-g60l-v1d_firmwareRange≤f10017

AND

pepperl-fuchsice1-16dio-g60l-v1dMatch-

Node

pepperl-fuchsice1-8di8do-g60l-c1-v1d_firmwareRange≤f10017

AND

pepperl-fuchsice1-8di8do-g60l-c1-v1dMatch-

Node

pepperl-fuchsice1-8di8do-g60l-v1d_firmwareRange≤f10017

AND

pepperl-fuchsice1-8di8do-g60l-v1dMatch-

Node

pepperl-fuchsice1-8iol-g30l-v1d_firmwareRange≤f10017

AND

pepperl-fuchsice1-8iol-g30l-v1dMatch-

Node

pepperl-fuchsice1-8iol-g60l-v1d_firmwareRange≤f10017

AND

pepperl-fuchsice1-8iol-g60l-v1dMatch-

Node

pepperl-fuchsice1-8iol-s2-g60l-v1d_firmwareRange≤f10017

AND

pepperl-fuchsice1-8iol-s2-g60l-v1dMatch-

CPENameOperatorVersion
hilscher:rcx_rtoshilscher rcx rtoslt2.1.14.1

CPE	Name	Operator	Version
hilscher:rcx_rtos	hilscher rcx rtos	lt	2.1.14.1

CNA Affected

[
  {
    "product": "rcX RTOS",
    "vendor": "Hilscher",
    "versions": [
      {
        "lessThan": "V2.1.14.1",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Ethernet IO Modules ICE1-16",
    "vendor": "Pepperl+Fuchs",
    "versions": [
      {
        "lessThanOrEqual": "F10017",
        "status": "affected",
        "version": "ICE1-16DI-G60L-V1D",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "F10017",
        "status": "affected",
        "version": "ICE1-16DIO-G60L-C1-V1D",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "F10017",
        "status": "affected",
        "version": "ICE1-16DIO-G60L-V1D",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Ethernet IO Modules ICE1-8",
    "vendor": "Pepperl+Fuchs",
    "versions": [
      {
        "lessThanOrEqual": "F10017",
        "status": "affected",
        "version": "ICE1-8DI8DO-G60L-C1-V1D",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "F10017",
        "status": "affected",
        "version": "ICE1-8DI8DO-G60L-V1D",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "F10017",
        "status": "affected",
        "version": "ICE1-8IOL-G30L-V1D",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "F10017",
        "status": "affected",
        "version": "ICE1-8IOL-G60L-V1D",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "F10017",
        "status": "affected",
        "version": "ICE1-8IOL-S2-G60L-V1D",
        "versionType": "custom"
      }
    ]
  }
]

References

cert.vde.com/de-de/advisories/vde-2021-018

kb.hilscher.com/display/ISMS/2019-04-10+Wrong+handling+of+the+UDP+checksum

Social References

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.3 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

45.8%

JSON

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