CVE-2019-11727

Medium

Description

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.

SeverityMedium

CVSS5.3

Exploit probability—

Product

Mozilla Firefox

PublishedJul 23, 2019

First seenJul 23, 2019

How to fix

Update

mozilla firefox68.0 or later

Vendor advisories

access.redhat.com/errata/RHSA-2019:1951
security.gentoo.org/glsa/201908-12

Affected products

Product	Affected versions	Fixed in
mozilla firefox	v < 68.0	68.0

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