PT-2020-12771 · Microchip · At91Bootstrap

Published 2020-09-14 · Updated 2021-04-08 · CVE-2020-11683

Positive Technologies (AI Summary)

CVSS v3.1

6.8

Medium

Base vector

AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions AT91bootstrap versions prior to 3.9.2

Description A timing side channel issue was discovered, allowing attackers with physical access to forge CMAC values and subsequently boot arbitrary code on an affected system.

Recommendations For versions prior to 3.9.2, update to version 3.9.2 or later to resolve the issue.

Exploit

Fix

Side Channel Attack

Weakness Enumeration

CWE-203

Related Identifiers

CVE-2020-11683

Affected Products

At91Bootstrap

References · 4

• 🔥 https://labs.f-secure.com/advisories/microchip-at91bootstrap · Exploit
• https://github.com/linux4sam/at91bootstrap/commit/7753914c9a622c245f3a3cf2af5e24b6a9904213 · Patch
• https://osv.dev/vulnerability/CVE-2020-11683 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-11683 · Security Note