HOMEVULNERABILITIESCVE-2020-11684
CRITICAL

CVE-2020-11684

CWE-212Published: September 14, 2020· Updated: Jun 17, 2026

9.1
CVSS v3.1

Official 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).

NVD Source

Technical Analysis

CVE-2020-11684 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected Vendors & Products

linux4sam1 product(s)
at91bootstrap
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927
PATCHhttps://github.com/linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927
ADVISORYhttps://labs.f-secure.com/advisories/microchip-at91bootstrap/
ADVISORYhttps://labs.f-secure.com/advisories/microchip-at91bootstrap/

All References (4)

→
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

Quick Facts

CVE IDCVE-2020-11684
CVSS Score9.1 / 10
SeverityCRITICAL
WeaknessCWE-212
CISA KEVNo
Affected1 vendor(s)
PublishedSep 14, 2020

Related CVEs (CWE-212)

CVE-2022-1650
9.3
CVE-2019-13402
8.8
CVE-2022-30617
8.8
CVE-2020-15094
8.8
CVE-2022-2818
8.8
CVE-2026-39937
8.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-11684 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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