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CERTVDECVELIST:CVE-2021-20988

HistoryFeb 15, 2021 - 12:00 a.m.

CVE-2021-20988 Hilscher rcX RTOS: Wrong handling of the UDP checksum

2021-02-1500:00:00

CWE-119

CERTVDE

www.cve.org

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

8.5 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.

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

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

8.5 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

45.8%

JSON

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