CVE-2020-11683
MEDIUM
6.8
CVSS Score
Published: September 14, 2020 at 01:31 PM UTC
Updated: June 17, 2026 at 02:50 AM UTC
1 product affected across 1 vendorAt91bootstrap
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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.5%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
3.7.2 ≤ v < 3.9.2
Affected range stops below 3.9.2, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/linux4sam/at91bootstrap/commit/7753914c9a622c245f3a3cf2af5e24b6a9904213x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://labs.f-secure.com/advisories/microchip-at91bootstrap/CVSS
- Attack Vector
- PHYSICAL
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-203
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