CVE-2020-36421 — Observable Discrepancy in ARM Mbed TLS

CWE-203 — Observable Discrepancy5 documents5 sources
Severity
5.3MEDIUMNVD
EPSS
0.5%
top 33.31%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mbed MbedtlsARM Mbed TLSDebian Linux
Timeline
PublishedJul 19
Latest updateMay 24

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitability: 3.9 | Impact: 1.4

Affected Packages2 packages

▶NVDarm/mbed_tls2.17.0 — 2.23.0+1
▶Debianmbed/mbedtls< 2.16.9-0.1+3

Also affects: Debian Linux 10.0

Patches

Patch: bugs.gentoo.org ↗Patch: bugs.gentoo.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-4h9j-8g4q-fcfq: An issue was discovered in Arm Mbed TLS before 2↗2022-05-24
▶
OSV
CVE-2020-36421: An issue was discovered in Arm Mbed TLS before 2↗2021-07-19
▶
CVEList
CVE-2020-36421: An issue was discovered in Arm Mbed TLS before 2↗2021-07-19
▶

📋Vendor Advisories

1
Debian
CVE-2020-36421: mbedtls - An issue was discovered in Arm Mbed TLS before 2.23.0. Because of a side channel...↗2020
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CVE-2020-36421 — Observable Discrepancy in ARM Mbed TLS | cvebase