CVE-2021-34569 WAGO I/O-Check Service prone to Out-of-bounds Write

2022-11-0915:17:36

CWE-787

CERTVDE

www.cve.org

wago

i/o-check service

out-of-bounds write

vulnerable

attack

memory

os commands

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

9.7

Confidence

High

EPSS

0.002

Percentile

58.3%

JSON

In WAGO I/O-Check Service in multiple products an attacker can send a specially crafted packet containing OS commands to crash the diagnostic tool and write memory.

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"
      }
    ]
  }
]