CVE-2024-9055

Secret-key extraction via unreseeded DPA countermeasures

Published Mar 17, 2025 · Updated Mar 17, 2025

Insufficient entropy in Silicon Labs Simplicity SDK affects Series 2 devices and allows physically proximate attackers to extract secret keys. The Series 2 DPA countermeasures fail to reseed periodically, so repeated power-analysis measurements eventually expose key-dependent information. Exploitation requires physical access, high attack complexity, and enough traces to recover keys; no integrity or availability impact is reported.

CVSS severity4.2
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient entropy in Silicon Labs Simplicity SDK affects Series 2 devices and allows physically proximate attackers to extract secret keys. The Series 2 DPA countermeasures fail to reseed periodically, so repeated power-analysis measurements eventually expose key-dependent information. Exploitation requires physical access, high attack complexity, and enough traces to recover keys; no integrity or availability impact is reported.

The record

CVE
CVE-2024-9055
Published
Mar 17, 2025
Updated
Mar 17, 2025
Vendor
Sigma Designs
Product
Simplicity SDK
Classifications
CWE-331, CAPEC-212
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=*.*

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Sigma Designs · Simplicity SDKversion=0 <=*.*

Published CVSS scores

4.2Silicon LabsCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-331Insufficient Entropy
CAPEC-212Functionality Misuse

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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