A vulnerability, which was classified as critical, was found in Mozilla Firefox up to 67.x (Web Browser). Affected is some unknown functionality of the component Network Security Services. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was shared 07/23/2019 (Website). The advisory is shared for download at security.gentoo.org. This vulnerability is traded as CVE-2019-11727 since 05/03/2019. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1587.003.

Upgrading to version 68.0 eliminates this vulnerability.

The entries 138488, 138489, 138490 and 138491 are related to this item.

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Firefox

Version

• 67.x

License

• open-source

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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