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.

References

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

https://access.redhat.com/errata/RHSA-2019:1951

https://bugzilla.mozilla.org/show_bug.cgi?id=1552208

https://security.gentoo.org/glsa/201908-12

https://www.mozilla.org/security/advisories/mfsa2019-21/

Details

Risk Information

CVSS v2

CVSS v3