CVE-2021-34573— Incorrect calculation in Enbra EWM does not report backflows or no flow events
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I. Basic Information for CVE-2021-34573
Vulnerability Information
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Vulnerability Title
Incorrect calculation in Enbra EWM does not report backflows or no flow events
Source: NVD (National Vulnerability Database)
Vulnerability Description
In Enbra EWM in Version 1.7.29 together with several tested wireless M-Bus Sensors the events backflow and "no flow" are not reconized or misinterpreted. This may lead to wrong values and missing events.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
数值计算不正确
Source: NVD (National Vulnerability Database)
Vulnerability Title
Enbra EWM 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability 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 1.7.29 存在安全漏洞，该漏洞源于在版本1.7.29的Enbra EWM和几个经过测试的无线M-Bus传感器中，事件回流和“无流量”不会被重新识别或误解。这可能会导致错误的值和丢失事件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Enbra | AT-WMBUS-16-2 | all | - | |
| Enbra | ER-AM DN 15 | ER-AM DN 15/SV all | - | |
| Enbra | EWM 1.7.29 | 03.11.2019 | - |
II. Public POCs for CVE-2021-34573
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://www.fit.vutbr.cz/~polcak/CVE-2021-34573.enx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-34573
Same Patch Batch · Enbra · 2021-09-16 · 3 CVEs total
| CVE-2021-34571 | 6.5 MEDIUM | Hard-coded Credentials in Enbra Wireless M-Bus devices |
| CVE-2021-34572 | 6.5 MEDIUM | Insufficient Verification of Data Authenticity in Enbra EWM (replay attack) |
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V. Comments for CVE-2021-34573
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