CVE-2019-11727

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.

• CWE-295

• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00006.html
• https://access.redhat.com/errata/RHSA-2019:1951
• https://bugzilla.mozilla.org/show_bug.cgi?id=1552208Issue Tracking, Permissions Required, Vendor Advisory
• https://security.gentoo.org/glsa/201908-12
• https://www.mozilla.org/security/advisories/mfsa2019-21/Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00006.html
• https://access.redhat.com/errata/RHSA-2019:1951
• https://bugzilla.mozilla.org/show_bug.cgi?id=1552208Issue Tracking, Permissions Required, Vendor Advisory
• https://security.gentoo.org/glsa/201908-12
• https://www.mozilla.org/security/advisories/mfsa2019-21/Vendor Advisory

Published

Jul 23, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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