Vulnerability Details : CVE-2020-36421
An issue was discovered in Arm Mbed TLS before 2.23.0. Because of a side channel in modular exponentiation, an RSA private key used in a secure enclave could be disclosed.
Products affected by CVE-2020-36421
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
- cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-36421
0.41%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 74 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-36421
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
3.9
|
1.4
|
NIST |
CWE ids for CVE-2020-36421
-
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-2020-36421
-
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
[SECURITY] [DLA 3249-1] mbedtls security updateMailing List;Third Party Advisory
-
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.7
Release Mbed TLS 2.16.7 · ARMmbed/mbedtls · GitHubRelease Notes;Third Party Advisory
-
https://github.com/ARMmbed/mbedtls/releases/tag/v2.23.0
Release Mbed TLS 2.23.0 · ARMmbed/mbedtls · GitHubRelease Notes;Third Party Advisory
-
https://github.com/ARMmbed/mbedtls/issues/3394
Leaking control-flow (Frontal attack) · Issue #3394 · ARMmbed/mbedtls · GitHubExploit;Issue Tracking;Third Party Advisory
-
https://bugs.gentoo.org/730752
730752 – (CVE-2020-36421, CVE-2020-36422, CVE-2020-36423) <net-libs/mbedtls-{2.16.7,2.23.0}: Multiple vulnerabilities (CVE-2020-{36421,36422,36423})Issue Tracking;Patch;Third Party Advisory
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