CVE-2019-11727

Source
Severity Low
Remote Yes
Type Silent downgrade
Description
A vulnerability exists in Firefox before 68.0 where it is 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.
Group Package Affected Fixed Severity Status Ticket
AVG-1002 firefox 67.0.4-2 68.0-1 Critical Fixed
Date Advisory Group Package Severity Description
17 Jul 2019 ASA-201907-4 AVG-1002 firefox Critical multiple issues
References
https://www.mozilla.org/en-US/security/advisories/mfsa2019-21/#CVE-2019-11727
https://bugzilla.mozilla.org/show_bug.cgi?id=1552208