CVE-2021-34567 WAGO I/O-Check Service prone to Out-of-bounds Read

2022-11-0915:17:23

CWE-125

CERTVDE

www.cve.org

wago

i/o-check service

out-of-bounds read

vulnerability

cve-2021-34567

denial of service

os commands

CVSS3

8.2

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

8.4

Confidence

High

EPSS

0.002

Percentile

55.2%

JSON

In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to provoke a denial of service and an limited out-of-bounds read.

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "product": "750-81xx/xxx-xxxFW",
    "vendor": "WAGO",
    "versions": [
      {
        "lessThanOrEqual": "FW18 Patch 2",
        "status": "affected",
        "version": "FW1",
        "versionType": "custom"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "product": "750-82xx/xxx-xxx",
    "vendor": "WAGO",
    "versions": [
      {
        "lessThanOrEqual": "FW18 Patch 2",
        "status": "affected",
        "version": "FW1",
        "versionType": "custom"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "product": "752-8303/8000-0002",
    "vendor": "WAGO",
    "versions": [
      {
        "lessThanOrEqual": "FW18 Patch 2",
        "status": "affected",
        "version": "FW1",
        "versionType": "custom"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "product": "762-4xxx",
    "vendor": "WAGO",
    "versions": [
      {
        "lessThanOrEqual": "FW18 Patch 2",
        "status": "affected",
        "version": "FW1",
        "versionType": "custom"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "product": "762-5xxx",
    "vendor": "WAGO",
    "versions": [
      {
        "lessThanOrEqual": "FW18 Patch 2",
        "status": "affected",
        "version": "FW1",
        "versionType": "custom"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "product": "762-6xxx",
    "vendor": "WAGO",
    "versions": [
      {
        "lessThanOrEqual": "FW18 Patch 2",
        "status": "affected",
        "version": "FW1",
        "versionType": "custom"
      }
    ]
  }
]