VulnerabilityModified
CVE-2020-11684
This can be exploited to disclose these keys and subsequently encrypt and sign the next boot stage (such as the bootloader).
CRITICAL 9.1EPSS 1.08%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.08%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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).
- CVSS 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 1.08% probability · 63th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-212
- Affected
- linux4sam/at91bootstrap
- Source
- cve@mitre.org
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.