CVE-2020-11684

Name: CVE-2020-11684
Creator: NVD / NIST
Published: 2020-09-14T14:15:10.68+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 1.08%

Last modified Jun 17, 2026

CVE-2020-11684 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. AT91bootstrap before 3.9.2 does not properly wipe encryption and authentication keys from memory before passing control to a less privileged software component. This can be exploited to disclose these keys and subsequently encrypt and sign the next boot stage (such as the bootloader).. EPSS estimates a 1.08% chance of exploitation in the next 30 days.

Description

AT91bootstrap before 3.9.2 does not properly wipe encryption and authentication keys from memory before passing control to a less privileged software component. This can be exploited to disclose these keys and subsequently encrypt and sign the next boot stage (such as the bootloader).

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

1.08%

60.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-212

Affected Software

Vendor	Product	Versions
Linux4sam	At91bootstrap	>= 3.7.2, < 3.9.2

References

https://github.com/linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927Patch, Third Party Advisory
https://labs.f-secure.com/advisories/microchip-at91bootstrap/Exploit, Third Party Advisory
https://github.com/linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927Patch, Third Party Advisory
https://labs.f-secure.com/advisories/microchip-at91bootstrap/Exploit, Third Party Advisory

Timeline

Published: Sep 14, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-11684?

How severe is CVE-2020-11684?

CVE-2020-11684 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.08% probability of exploitation in the next 30 days.

How do I fix CVE-2020-11684?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-11684?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST