Vulnerability-Lookup

CNVD-2021-50095

Vulnerability from cnvd - Published: 2021-07-13

Title

Allen Bradley Micrologix 1100输入验证错误漏洞

Description

Allen Bradley Micrologix 1100是荷兰Allen Bradley公司的一款用于工业环境的可编程控制器。该设备之支持以太网连接访问，监视和编程支持在线编辑、提供嵌入式Web服务器来支持通过网页控制设备，同时支持可以通过嵌入式LCD屏幕监视和修改控制器数据。 MicroLogix 1100 存在输入验证错误漏洞，该漏洞源于该产品不正确的输入验证。攻击者可利用该漏洞导致控制器在控制器故障时发生故障切换到运行模式。

Severity

中

Patch Name

Allen Bradley Micrologix 1100输入验证错误漏洞的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，详情请关注厂商主页： https://www.auscert.org.au/bulletins/ESB-2021.2345

Impacted products

Name
Allen Bradley Micrologix 1100

Show details on source website

JSON

To clipboard

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-33012"
    }
  },
  "description": "Allen Bradley Micrologix 1100\u662f\u8377\u5170Allen Bradley\u516c\u53f8\u7684\u4e00\u6b3e\u7528\u4e8e\u5de5\u4e1a\u73af\u5883\u7684\u53ef\u7f16\u7a0b\u63a7\u5236\u5668\u3002\u8be5\u8bbe\u5907\u4e4b\u652f\u6301\u4ee5\u592a\u7f51\u8fde\u63a5\u8bbf\u95ee\uff0c\u76d1\u89c6\u548c\u7f16\u7a0b\u652f\u6301\u5728\u7ebf\u7f16\u8f91\u3001\u63d0\u4f9b\u5d4c\u5165\u5f0fWeb\u670d\u52a1\u5668\u6765\u652f\u6301\u901a\u8fc7\u7f51\u9875\u63a7\u5236\u8bbe\u5907\uff0c\u540c\u65f6\u652f\u6301\u53ef\u4ee5\u901a\u8fc7\u5d4c\u5165\u5f0fLCD\u5c4f\u5e55\u76d1\u89c6\u548c\u4fee\u6539\u63a7\u5236\u5668\u6570\u636e\u3002\n\nMicroLogix 1100 \u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8be5\u4ea7\u54c1\u4e0d\u6b63\u786e\u7684\u8f93\u5165\u9a8c\u8bc1\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u63a7\u5236\u5668\u5728\u63a7\u5236\u5668\u6545\u969c\u65f6\u53d1\u751f\u6545\u969c\u5207\u6362\u5230\u8fd0\u884c\u6a21\u5f0f\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8be6\u60c5\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\uff1a\r\nhttps://www.auscert.org.au/bulletins/ESB-2021.2345",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-50095",
  "openTime": "2021-07-13",
  "patchDescription": "Allen Bradley Micrologix 1100\u662f\u8377\u5170Allen Bradley\u516c\u53f8\u7684\u4e00\u6b3e\u7528\u4e8e\u5de5\u4e1a\u73af\u5883\u7684\u53ef\u7f16\u7a0b\u63a7\u5236\u5668\u3002\u8be5\u8bbe\u5907\u4e4b\u652f\u6301\u4ee5\u592a\u7f51\u8fde\u63a5\u8bbf\u95ee\uff0c\u76d1\u89c6\u548c\u7f16\u7a0b\u652f\u6301\u5728\u7ebf\u7f16\u8f91\u3001\u63d0\u4f9b\u5d4c\u5165\u5f0fWeb\u670d\u52a1\u5668\u6765\u652f\u6301\u901a\u8fc7\u7f51\u9875\u63a7\u5236\u8bbe\u5907\uff0c\u540c\u65f6\u652f\u6301\u53ef\u4ee5\u901a\u8fc7\u5d4c\u5165\u5f0fLCD\u5c4f\u5e55\u76d1\u89c6\u548c\u4fee\u6539\u63a7\u5236\u5668\u6570\u636e\u3002\r\n\r\nMicroLogix 1100 \u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8be5\u4ea7\u54c1\u4e0d\u6b63\u786e\u7684\u8f93\u5165\u9a8c\u8bc1\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u63a7\u5236\u5668\u5728\u63a7\u5236\u5668\u6545\u969c\u65f6\u53d1\u751f\u6545\u969c\u5207\u6362\u5230\u8fd0\u884c\u6a21\u5f0f\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Allen Bradley Micrologix 1100\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Allen Bradley Micrologix 1100"
  },
  "serverity": "\u4e2d",
  "submitTime": "2021-07-09",
  "title": "Allen Bradley Micrologix 1100\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2021-33012 (GCVE-0-2021-33012)

Vulnerability from cvelistv5 – Published: 2021-07-09 14:03 – Updated: 2026-06-03 13:18

Summary

Rockwell Automation MicroLogix 1100, all versions, allows a remote, unauthenticated attacker sending specially crafted commands to cause the PLC to fault when the controller is switched to RUN mode, which results in a denial-of-service condition. If successfully exploited, this vulnerability will cause the controller to fault whenever the controller is switched to RUN mode.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-03 13:17 UTC

CWE

CWE-20 - IMPROPER INPUT VALIDATION CWE-20

Assigner

icscert icscert root

References

1 reference

URL	Tags
https://us-cert.cisa.gov/ics/advisories/icsa-21-189-01	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	Rockwell Automation MicroLogix 1100	Affected: All Versions

Show details on NVD website

JSON

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{
  "containers": {
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      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:42:19.616Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-189-01"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
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                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-03T13:17:35.412176Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-03T13:18:00.338Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Rockwell Automation MicroLogix 1100",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "All Versions"
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      ],
      "descriptions": [
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          "value": "Rockwell Automation MicroLogix 1100, all versions, allows a remote, unauthenticated attacker sending specially crafted commands to cause the PLC to fault when the controller is switched to RUN mode, which results in a denial-of-service condition. If successfully exploited, this vulnerability will cause the controller to fault whenever the controller is switched to RUN mode."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "IMPROPER INPUT VALIDATION CWE-20",
              "lang": "en",
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-07-09T14:03:55.000Z",
        "orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
        "shortName": "icscert"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-189-01"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "ics-cert@hq.dhs.gov",
          "ID": "CVE-2021-33012",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Rockwell Automation MicroLogix 1100",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "All Versions"
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                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
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            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "IMPROPER INPUT VALIDATION CWE-20"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://us-cert.cisa.gov/ics/advisories/icsa-21-189-01",
              "refsource": "MISC",
              "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-189-01"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
    "assignerShortName": "icscert",
    "cveId": "CVE-2021-33012",
    "datePublished": "2021-07-09T14:03:55.000Z",
    "dateReserved": "2021-05-13T00:00:00.000Z",
    "dateUpdated": "2026-06-03T13:18:00.338Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.