Improper Certificate Validation Affecting nss-sysinit package, versions <0:3.53.1-3.amzn2


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.65% (80th percentile)

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  • Snyk IDSNYK-AMZN2-NSSSYSINIT-1688876
  • published27 Sept 2021
  • disclosed23 Jul 2019

Introduced: 23 Jul 2019

CVE-2019-11727  (opens in a new tab)
CWE-295  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade Amazon-Linux:2 nss-sysinit to version 0:3.53.1-3.amzn2 or higher.
This issue was patched in ALAS2-2020-1559.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nss-sysinit package and not the nss-sysinit package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

A vulnerability exists where it possible to force Network Security Services (NSS) to sign CertificateVerify with PKCS#1 v1.5 signatures when those are the only ones advertised by server in CertificateRequest in TLS 1.3. PKCS#1 v1.5 signatures should not be used for TLS 1.3 messages. This vulnerability affects Firefox < 68.