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CVE-2020-16150

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Date: September 1, 2020

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.

Language: C

Severity Score

Related Resources (13)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IRPBHCQKZXHVKOP5O5EWE7P76AWGUXQJ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OD3NM6GD73CTFFRBKG5G2ACXGG7QQHCC/
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5OSOFUD6UTGTDDSQRS62BPXDU52I6PUA/
https://tls.mbed.org/tech-updates/security-advisories
https://nvd.nist.gov/vuln/detail/CVE-2020-16150
https://security-tracker.debian.org/tracker/CVE-2020-16150
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IRPBHCQKZXHVKOP5O5EWE7P76AWGUXQJ/
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-09-1
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OD3NM6GD73CTFFRBKG5G2ACXGG7QQHCC/
https://security.alpinelinux.org/vuln/CVE-2020-16150
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5OSOFUD6UTGTDDSQRS62BPXDU52I6PUA/
https://www.mend.io/vulnerability-database/CVE-2020-16150

Severity Score

Weakness Type (CWE)

Observable Discrepancy

CWE-203

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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