CVE-2021-34573 - CVE House
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Status published Medium CVE-2021-34573

Incorrect calculation in Enbra EWM does not report backflows or no flow events

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Libor POLČÁK reported to CERT@VDE

References

More from Enbra

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CVE-2021-34572
Insufficient Verification of Data Authenticity in Enbra EWM (replay attack)
Medium 6.5
CVE-2021-34571
Hard-coded Credentials in Enbra Wireless M-Bus devices
Medium 6.5

Affected Vendor

Affected Software

AT-WMBUS-16-2, ER-AM DN 15, EWM 1.7.29
Vulnerable Versions:
all, ER-AM DN 15/SV all, ER-AM DN 15/TV all, 03.11.2019

Timeline

Official Publish: September 16th, 2021
Last Modified: September 17th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weaknesses (CWE)

CWE-682

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.