Vulnerability-Lookup

CNVD-2021-46283

Vulnerability from cnvd - Published: 2021-07-01

Title

Schneider Electric Modicon M340代码问题漏洞

Description

Schneider Electric Modicon M340是法国施耐德电气（Schneider Electric）公司的一款用于工业过程和基础设施的中程PLC（可编程逻辑控制器）。 Schneider Electric Modicon M340存在代码问题漏洞，攻击者可利用漏洞编制请求通过HTTP发送到控制器时，会导致拒绝HTTP和FTP服务。

Severity

中

Patch Name

Schneider Electric Modicon M340代码问题漏洞的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://www.se.com/ww/en/download/document/SEVD-2020-343-06/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-7549

Impacted products

Name
Schneider Electric Modicon M340

Show details on source website

JSON

To clipboard

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-7549",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-7549"
    }
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-46283",
  "openTime": "2021-07-01",
  "patchDescription": "Schneider Electric Modicon M340\u662f\u6cd5\u56fd\u65bd\u8010\u5fb7\u7535\u6c14\uff08Schneider Electric\uff09\u516c\u53f8\u7684\u4e00\u6b3e\u7528\u4e8e\u5de5\u4e1a\u8fc7\u7a0b\u548c\u57fa\u7840\u8bbe\u65bd\u7684\u4e2d\u7a0bPLC\uff08\u53ef\u7f16\u7a0b\u903b\u8f91\u63a7\u5236\u5668\uff09\u3002\r\n\r\nSchneider Electric Modicon M340\u5b58\u5728\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u6f0f\u6d1e\u7f16\u5236\u8bf7\u6c42\u901a\u8fc7HTTP\u53d1\u9001\u5230\u63a7\u5236\u5668\u65f6\uff0c\u4f1a\u5bfc\u81f4\u62d2\u7eddHTTP\u548cFTP\u670d\u52a1\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": "Schneider Electric Modicon M340\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Schneider Electric  Modicon M340"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-7549",
  "serverity": "\u4e2d",
  "submitTime": "2020-12-16",
  "title": "Schneider Electric Modicon M340\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2020-7549 (GCVE-0-2020-7549)

Vulnerability from cvelistv5 – Published: 2020-12-11 00:52 – Updated: 2026-05-28 21:05

Summary

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause denial of HTTP and FTP services when a series of specially crafted requests is sent to the controller over HTTP.

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 2026-05-28 21:03 UTC

CWE

CWE-754 - Improper Check for Unusual or Exceptional Conditions

Assigner

schneider mitre root

References

1 reference

URL	Tags
https://www.se.com/ww/en/download/document/SEVD-2…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
n/a	Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions)	Affected: Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions)

Show details on NVD website

JSON

To clipboard

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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
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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

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