Vulnerability CVE-2019-11727
Published: 2019-07-23

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.

Type:

CWE-295

 (Certificate Issues)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Mozilla -> Firefox 

 References:
https://access.redhat.com/errata/RHSA-2019:1951
https://bugzilla.mozilla.org/show_bug.cgi?id=1552208
https://www.mozilla.org/security/advisories/mfsa2019-21/
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