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Vulnerability · Published Sep 2, 2020 · Assigned by mitre

CVE-2020-16150

Medium 5.5

In plain English

A medium-severity security flaw in the mbedtls package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.4%top 67.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20mbedtls2.16.8-r0ALPINE-CVE-2020-16150
Alpine:v3.21mbedtls2.16.8-r0ALPINE-CVE-2020-16150
Alpine:v3.22mbedtls2.16.8-r0ALPINE-CVE-2020-16150
Alpine:v3.23mbedtls2.16.8-r0ALPINE-CVE-2020-16150
Alpine:v3.24mbedtls2.16.8-r0ALPINE-CVE-2020-16150
Alpine:v3.20mbedtls22.16.8-r0ALPINE-CVE-2020-16150
Alpine:v3.21mbedtls22.16.8-r0ALPINE-CVE-2020-16150
Alpine:v3.22mbedtls22.16.8-r0ALPINE-CVE-2020-16150
Alpine:v3.23mbedtls22.16.8-r0ALPINE-CVE-2020-16150
Alpine:v3.24mbedtls22.16.8-r0ALPINE-CVE-2020-16150
Alpine:v3.24mbedtls32.16.8-r0ALPINE-CVE-2020-16150
Debian:12mbedtls2.16.9-0.1DEBIAN-CVE-2020-16150
Debian:13mbedtls2.16.9-0.1DEBIAN-CVE-2020-16150
Debian:14mbedtls2.16.9-0.1DEBIAN-CVE-2020-16150

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References