AT91bootstrap before 3.9.2 does not properly wipe encryption and authentication keys from memory before passing control to a less privileged software component
Published Sep 14, 2020
9.1
CRITICALCVSS 3.1
EPSS 1.08%
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).
Affected products
No data.
- ≥ 3.7.2 · < 3.9.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.08% (0.01077) | 63.77th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.08% (0.01077) | 63.55th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.17% (0.00168) | 53.91th | v3 (v2023.03.01) |
| Jan 18, 2024 | 0.17% (0.00168) | 53.57th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.14% (0.00139) | 48.67th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.11% (0.00106) | 41.38th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 9.03% (0.09029) | 86.86th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.74% (0.02742) | 63.06th | v1 |
| Jan 6, 2022 | 2.74% (0.02742) | 62.72th | v1 |
| Jan 5, 2022 | 0.62% (0.00624) | 46.35th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (2)
- https://github.com/linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927 x_refsource_MISCPatchThird Party Advisory
- https://labs.f-secure.com/advisories/microchip-at91bootstrap/ x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927 | x_refsource_MISCPatchThird Party Advisory | |
| https://labs.f-secure.com/advisories/microchip-at91bootstrap/ | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.