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CERTVDECVELIST:CVE-2021-34578

HistoryAug 31, 2021 - 12:00 a.m.

CVE-2021-34578 WAGO: Authentication Vulnerability in Web-Based Management

2021-08-3100:00:00

CWE-287

CERTVDE

www.cve.org

9.8 High

CVSS3

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

9.7 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

70.2%

JSON

This vulnerability allows an attacker who has access to the WBM to read and write settings-parameters of the device by sending specifically constructed requests without authentication on multiple WAGO PLCs in firmware versions up to FW07.

CNA Affected

[
  {
    "product": "PLC",
    "vendor": "WAGO",
    "versions": [
      {
        "lessThanOrEqual": "FW07",
        "status": "affected",
        "version": "750-362",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "FW07",
        "status": "affected",
        "version": "750-363",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "FW07",
        "status": "affected",
        "version": "750-823",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "FW07",
        "status": "affected",
        "version": "750-832/xxx-xxx",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "FW07",
        "status": "affected",
        "version": "750-862",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "FW07",
        "status": "affected",
        "version": "750-891",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "FW07",
        "status": "affected",
        "version": "750-890/xxx-xxx",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "FW07",
        "status": "affected",
        "version": "750-893",
        "versionType": "custom"
      }
    ]
  }
]

References

cert.vde.com/en-us/advisories/vde-2020-044

9.8 High

CVSS3

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

9.7 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

70.2%

JSON

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