PT-2020-12772 · Microchip · At91Bootstrap

Published 2020-09-14 · Updated 2021-07-21 · CVE-2020-11684

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

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

Description The issue allows for the disclosure of encryption and authentication keys from memory, which can then be used to encrypt and sign the next boot stage, such as the bootloader. This occurs because the encryption and authentication keys are not properly wiped from memory before control is passed to a less privileged software component.

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

Exploit

Fix

Weakness Enumeration

CWE-212

Related Identifiers

CVE-2020-11684

Affected Products

At91Bootstrap

References · 4

• 🔥 https://labs.f-secure.com/advisories/microchip-at91bootstrap · Exploit
• https://github.com/linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2020-11684 · Security Note
• https://osv.dev/vulnerability/CVE-2020-11684 · Vendor Advisory