CVE-2021-34572

Insufficient Verification of Data Authenticity in Enbra EWM (replay attack)

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Published Sep 16, 2021 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Description

Enbra EWM 1.7.29 does not check for or detect replay attacks sent by wireless M-Bus Security mode 5 devices. Instead timestamps of the sensor are replaced by the time of the readout even if the data is a replay of earlier data.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Enbra

EWM 1.7.29

affected

Version	Status	Constraints
`03.11.2019`	affected	—

Configuration 1 [-]

cpe:2.3:a:enbra:ewm:1.7.29:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2021-21222	Enbra EWM 1.7.29 does not check for or detect replay attacks sent by wireless M-Bus Security mode 5 devices. Instead timestamps of the sensor are replaced by the time of the readout even if the data is a replay of earlier data.

Metrics

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

Access Vector Adjacent Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.227% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://www.fit.vutbr.cz/~polcak/CVE-2021-34572.en

History

No history.

Subscriptions

Enbra Ewm

Weaknesses

CWE-345

Sources

CVE record Updated: Sep 16, 2024, 5:23 PM

Status: PUBLISHED
Assigner: CERTVDE
Published: Sep 16, 2021, 12:20 PM
Updated: Sep 16, 2024, 5:23 PM
Reserved: Jun 10, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 3:56 AM

Status: Modified
Published: Sep 16, 2021, 1:15 PM
Modified: Jun 17, 2026, 3:56 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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