TI-2020-09375 Aliases CVE-2020-11683 GHSA-wrjw-6w8m-xcwh

A timing side channel was discovered in AT91bootstrap before 3.9.2.

LOW 31CWE-203Published 2020-09-14 · Updated 2024-08-04

Key facts

Attack vector: Physical
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-203.

Summary

A timing side channel was discovered in AT91bootstrap before 3.9.2. It can be exploited by attackers with physical access to forge CMAC values and subsequently boot arbitrary code on an affected system.

Why it matters now

EPSS 0.00514 44th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:linux4sam:at91bootstrap::::::::	3.7.2 to before 3.9.2	Vulnerable	Linux4sam

cpe:2.3:a:linux4sam:at91bootstrap:*:*:*:*:*:*:*:* Versions 3.7.2 to before 3.9.2 Vulnerable ·Linux4sam

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-11683
2026-10-03 Alias added: GHSA-wrjw-6w8m-xcwh

References

Exploit 1

https://labs.f-secure.com/advisories/microchip-at91bootstrap/

Patch 1

https://github.com/linux4sam/at91bootstrap/commit/7753914c9a622c245f3a3cf2af5e24b6a9904213

TI-2020-09376 AT91bootstrap before 3.9.2 does not properly wipe encryption and authentication keys from… CVSS 3.1CRITICAL 9.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences