Vulnerability-Lookup

CNVD-2021-102882

Vulnerability from cnvd - Published: 2021-12-28

Title

Enbra Ewm信任管理问题漏洞

Description

Enbra Ewm是捷克Enbra公司的一个通用读数装置。使用无线电读取水表、供暖成本指标和热量表。 Enbra EWM存在信任管理问题漏洞，该漏洞源于Enbra的多个无线M-Bus设备在安全模式5中使用硬编码凭证，没有更改加密密钥的选项。攻击者可以了解Enbra EWM中提供的所有信息。

Severity

低

Formal description

厂商尚未提供漏洞修复方案，请关注厂商主页更新： https://www.enbra.cz/

Reference

https://www.fit.vutbr.cz/~polcak/CVE-2021-34571.en

Impacted products

Name
Enbra EWM

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-34571",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-34571"
    }
  },
  "description": "Enbra Ewm\u662f\u6377\u514bEnbra\u516c\u53f8\u7684\u4e00\u4e2a\u901a\u7528\u8bfb\u6570\u88c5\u7f6e\u3002\u4f7f\u7528\u65e0\u7ebf\u7535\u8bfb\u53d6\u6c34\u8868\u3001\u4f9b\u6696\u6210\u672c\u6307\u6807\u548c\u70ed\u91cf\u8868\u3002\n\nEnbra EWM\u5b58\u5728\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eEnbra\u7684\u591a\u4e2a\u65e0\u7ebfM-Bus\u8bbe\u5907\u5728\u5b89\u5168\u6a21\u5f0f5\u4e2d\u4f7f\u7528\u786c\u7f16\u7801\u51ed\u8bc1\uff0c\u6ca1\u6709\u66f4\u6539\u52a0\u5bc6\u5bc6\u94a5\u7684\u9009\u9879\u3002\u653b\u51fb\u8005\u53ef\u4ee5\u4e86\u89e3Enbra EWM\u4e2d\u63d0\u4f9b\u7684\u6240\u6709\u4fe1\u606f\u3002",
  "formalWay": "\u5382\u5546\u5c1a\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1a\r\nhttps://www.enbra.cz/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-102882",
  "openTime": "2021-12-28",
  "products": {
    "product": "Enbra EWM"
  },
  "referenceLink": "https://www.fit.vutbr.cz/~polcak/CVE-2021-34571.en",
  "serverity": "\u4f4e",
  "submitTime": "2021-09-18",
  "title": "Enbra Ewm\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2021-34571 (GCVE-0-2021-34571)

Vulnerability from cvelistv5 – Published: 2021-09-16 12:20 – Updated: 2024-09-16 16:13

Title

Hard-coded Credentials in Enbra Wireless M-Bus devices

Summary

Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an option to change the encryption key. An adversary can learn all information that is available in Enbra EWM.

Severity

6.5 (Medium)


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

CWE

CWE-798 - Use of Hard-coded Credentials

Assigner

CERTVDE icscert root

References

1 reference

URL	Tags
https://www.fit.vutbr.cz/~polcak/CVE-2021-34571.en	x_refsource_CONFIRM

Impacted products

3 products

Vendor	Product	Version
Enbra	AT-WMBUS-16-2	Unknown: all
Enbra	ER-AM DN 15	Unknown: ER-AM DN 15/SV all Unknown: ER-AM DN 15/TV all
Enbra	EWM 1.7.29	Affected: 03.11.2019

Date Public

2021-08-31 00:00

Credits

Libor POLČÁK reported to CERT@VDE

Show details on NVD website

JSON

To clipboard

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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

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.