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Improper Certificate Validation Affecting thunderbird package, versions <1:68.7.0+build1-0ubuntu0.16.04.2

Severity

 Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.65% (80th percentile)

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  • Snyk IDSNYK-UBUNTU1604-THUNDERBIRD-458668
  • published24 Jul 2019
  • disclosed23 Jul 2019
Report a new vulnerability Found a mistake?

Introduced: 23 Jul 2019

CVE-2019-11727  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Ubuntu:16.04 thunderbird to version 1:68.7.0+build1-0ubuntu0.16.04.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 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.