CVE-2020-11683

CVSS V2 Medium 4.6 CVSS V3 Medium 6.8

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.

Overview

CVE ID
CVE-2020-11683

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2020-09-14T14:15:10

Last Modified Date
2021-04-08T14:47:48

Weakness Enumerations

CWE	URL
CWE-203	http://cwe.mitre.org/data/definitions/203.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:linux4sam:at91bootstrap::::::::	1	OR	3.7.2	3.9.2

CVSS Version 2

Version
2.0

Vector String
AV:L/AC:L/Au:N/C:P/I:P/A:P

Access Vector
LOCAL

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
PARTIAL

Availability Impact
PARTIAL

Base Score
4.6

Severity
MEDIUM

Exploitability Score
3.9

Impact Score
6.4

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
PHYSICAL

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
6.8

Base Severity
MEDIUM

Exploitability Score
0.9

Impact Score
5.9

References

Reference URL	Reference Tags
https://labs.f-secure.com/advisories/microchip-at91bootstrap/	Exploit Third Party Advisory
https://github.com/linux4sam/at91bootstrap/commit/7753914c9a622c245f3a3cf2af5e24b6a9904213	Patch Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2020-11683
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11683

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 07:16:45				Added to TrackCVE
2022-12-04 22:34:50	2020-09-14T14:15Z	2020-09-14T14:15:10	CVE Published Date	updated
2022-12-04 22:34:50		2021-04-08T14:47:48	CVE Modified Date	updated
2022-12-04 22:34:50		Analyzed	Vulnerability Status	updated