CVE-2020-11684 json
AT91bootstrap before 3.9.2 does not properly wipe encryption and authentication keys from memory before passing control to a less privilege…
published 2020-09-14 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-4026
- cvss
- 9.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 65%
- public exploits
- 0
- none known
Summary
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).
Patch / fix
Exploit prediction
1.08% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- labs.f-secure.com https://labs.f-secure.com/advisories/microchip-at91bootstrap/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:P/I:P/A:N |
Classification
- Weakness
-
- CWE-212 Improper Removal of Sensitive Information Before Storage or Transfer
References
-
github.com
/linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927
patch, third-party-advisory
-
labs.f-secure.com
/advisories/microchip-at91bootstrap/
exploit, third-party-advisory
Sources
- CVE List CVE-2020-11684
- NVD CVE-2020-11684
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.