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FreeBSD: VID-4C69240F-F02C-11EA-838A-0011D823EEBD (CVE-2020-16150): Mbed TLS -- Local side channel attack on classical CBC decryption in (D)TLS

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FreeBSD: VID-4C69240F-F02C-11EA-838A-0011D823EEBD (CVE-2020-16150): Mbed TLS -- Local side channel attack on classical CBC decryption in (D)TLS

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
09/01/2020
Created
09/09/2020
Added
09/07/2020
Modified
10/20/2020

Description

A Lucky 13 timing side channel in mbedtls_ssl_decrypt_buf in library/ssl_msg.c in Trusted Firmware Mbed TLS through 2.23.0 allows an attacker to recover secret key information. This affects CBC mode because of a computed time difference based on a padding length.

Solution(s)

  • freebsd-upgrade-package-mbedtls

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