Vulnerability Details : CVE-2020-11683
Potential exploit
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.
Products affected by CVE-2020-11683
- cpe:2.3:a:linux4sam:at91bootstrap:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-11683
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 15 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-11683
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.6
|
MEDIUM | AV:L/AC:L/Au:N/C:P/I:P/A:P |
3.9
|
6.4
|
NIST | |
|
6.8
|
MEDIUM | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
0.9
|
5.9
|
NIST |
CWE ids for CVE-2020-11683
-
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-11683
-
https://labs.f-secure.com/advisories/microchip-at91bootstrap/
Microchip AT91Bootstrap Code Authentication IssuesExploit;Third Party Advisory
-
https://github.com/linux4sam/at91bootstrap/commit/7753914c9a622c245f3a3cf2af5e24b6a9904213
driver: secure: use consttime_memequal for memory comparison · linux4sam/at91bootstrap@7753914 · GitHubPatch;Third Party Advisory
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