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[email protected]CVE-2021-34578

HistoryAug 31, 2021 - 11:15 a.m.

CVE-2021-34578

2021-08-3111:15:07

CWE-287

[email protected]

web.nvd.nist.gov

cve-2021-34578

vulnerability

unauthorized access

wago plcs

settings

parameters

nvd

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

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

8 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.

Affected configurations

NVD

Node

wago750-890\/040-000_firmwareRange≤fw07

AND

wago750-890\/040-000Match-

Node

wago750-890\/025-001_firmwareRange≤fw07

AND

wago750-890\/025-001Match-

Node

wago750-890\/025-002_firmwareRange≤fw07

AND

wago750-890\/025-002Match-

Node

wago750-890\/025-000_firmwareRange≤fw07

AND

wago750-890\/025-000Match-

Node

wago750-832\/000-002_firmwareRange≤fw07

AND

wago750-832\/000-002Match-

Node

wago750-362_firmwareRange≤fw07

AND

wago750-362Match-

Node

wago750-823_firmwareRange≤fw07

AND

wago750-823Match-

Node

wago750-832_firmwareRange≤fw07

AND

wago750-832Match-

Node

wago750-363_firmwareRange≤fw07

AND

wago750-363Match-

Node

wago750-862_firmwareRange≤fw07

AND

wago750-862Match-

Node

wago750-891_firmwareRange≤fw07

AND

wago750-891Match-

Node

wago750-893_firmwareRange≤fw07

AND

wago750-893Match-

CPENameOperatorVersion
wago:750-890\/040-000_firmwarewago 750-890/040-000 firmwarelefw07

CPE	Name	Operator	Version
wago:750-890\/040-000_firmware	wago 750-890/040-000 firmware	le	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

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

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

8 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

70.2%

JSON

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