Vulnerability in Linux4sam At91bootstrap
CVE-2020-11683
A timing side channel was discovered in AT91bootstrap before 3.9.2. It can be exploited by attackers with physical access to forge CMAC values and subsequently boot arbitrary code on an affected system.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (41.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/linux4sam/at91bootstrap/commit/7753914c9a622c245f3a3cf2af5e24b6a9904… (Patch, Third Party Advisory)
- labs.f-secure.com/advisories/microchip-at91bootstrap/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-11683?
- CVE-2020-11683 is a medium-severity vulnerability in Linux4sam At91bootstrap, classified under Observable Discrepancy. CVSS score: 6.8/10. Published 2020-09-14.
- How severe is CVE-2020-11683?
- Medium severity. CVSS v3 base score is 6.8 out of 10.
- Is CVE-2020-11683 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.