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Vulnerability details: VCID-qnku-acqz-tye6
Vulnerability ID VCID-qnku-acqz-tye6
Aliases CVE-2020-16150
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-203 Observable Discrepancy
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00071 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00071 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00071 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00071 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00071 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2020-16150
cvssv2 2.1 https://nvd.nist.gov/vuln/detail/CVE-2020-16150
cvssv3.1 5.5 https://nvd.nist.gov/vuln/detail/CVE-2020-16150
archlinux High https://security.archlinux.org/AVG-1386
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-16150
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16150
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5OSOFUD6UTGTDDSQRS62BPXDU52I6PUA/
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://tls.mbed.org/tech-updates/security-advisories
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-09-1
972806 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=972806
ASA-202101-7 https://security.archlinux.org/ASA-202101-7
AVG-1386 https://security.archlinux.org/AVG-1386
cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
CVE-2020-16150 https://nvd.nist.gov/vuln/detail/CVE-2020-16150
No exploits are available.
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-16150
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-16150
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.22237
EPSS Score 0.00071
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:35:55.193469+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.18/main.json 37.0.0