CVE-2019-11727 (NVD)

2019-07-23

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.

Products Firefox
Type Improper Certificate Validation (CWE-295)
First patch - None (likely due to unavailable code)
Links https://bugzilla.mozilla.org/show_bug.cgi?id=1552208
https://access.redhat.com/errata/RHSA-2019:1951
https://www.mozilla.org/security/advisories/mfsa2019-21/