PT-2020-14778 · Arm+2 · Mbed Tls+2

Published 2020-09-02 · Updated 2025-08-21 · CVE-2020-16150

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Trusted Firmware Mbed TLS versions prior to 2.23.0

Description A timing side channel in the mbedtls ssl decrypt buf function in the library/ssl msg.c file allows an attacker to recover secret key information. This issue affects CBC mode due to a computed time difference based on a padding length.

Recommendations For versions prior to 2.23.0, update to version 2.23.0 or later to resolve the issue. As a temporary workaround, consider restricting the use of CBC mode until a patch is available.

Fix

Side Channel Attack

Weakness Enumeration

CWE-203

Related Identifiers

ALT-PU-2020-2711

ALT-PU-2021-2234

ALT-PU-2025-10462

CVE-2020-16150

DLA-3249-1

MGASA-2020-0370

Affected Products

Alt Linux

Astra Linux

Mbed Tls

References · 22

• https://advisories.mageia.org/MGASA-2020-0370.html · Security Note
• https://ubuntu.com/security/CVE-2020-16150 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OD3NM6GD73CTFFRBKG5G2ACXGG7QQHCC · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2020-16150 · Vendor Advisory
• https://tls.mbed.org/tech-updates/security-advisories · Vendor Advisory
• https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-09-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-16150 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-16150 · Security Note
• https://osv.dev/vulnerability/CVE-2020-16150 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-3249-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-16150 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IRPBHCQKZXHVKOP5O5EWE7P76AWGUXQJ · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5OSOFUD6UTGTDDSQRS62BPXDU52I6PUA · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-16150 · Security Note
• https://osv.dev/vulnerability/MGASA-2020-0370 · Vendor Advisory