CVE-2021-31609

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Published Sep 7, 2021 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Description

The Bluetooth Classic implementation in Silicon Labs iWRAP 6.3.0 and earlier does not properly handle the reception of an oversized LMP packet greater than 17 bytes, allowing attackers in radio range to trigger a crash in WT32i via a crafted LMP packet.

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

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

AND

cpe:2.3:a:silabs:iwrap:*:*:*:*:*:*:*:*

cpe:2.3:h:silabs:wt32i-a:-:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-18498	The Bluetooth Classic implementation in Silicon Labs iWRAP 6.3.0 and earlier does not properly handle the reception of an oversized LMP packet greater than 17 bytes, allowing attackers in radio range to trigger a crash in WT32i via a crafted LMP packet.

Metrics

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Adjacent Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.413% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
https://www.silabs.com/wireless/bluetooth/bluegiga-classic-legacy-modules/device.wt32i-a

History

No history.

Subscriptions

Silabs Iwrap Wt32i-a

Weaknesses

NVD-CWE-noinfo

Sources

CVE record Updated: Aug 3, 2024, 11:03 PM

Status: PUBLISHED
Assigner: mitre
Published: Sep 7, 2021, 6:30 AM
Updated: Aug 3, 2024, 11:03 PM
Reserved: Apr 23, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 3:52 AM

Status: Modified
Published: Sep 7, 2021, 7:15 AM
Modified: Jun 17, 2026, 3:52 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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