Improper Certificate Validation Affecting firefox package, versions <68.0+build3-0ubuntu1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2104-FIREFOX-1266367
- published24 Jul 2019
- disclosed23 Jul 2019
Introduced: 23 Jul 2019
CVE-2019-11727 (opens in a new tab)How to fix?
Upgrade Ubuntu:21.04 firefox to version 68.0+build3-0ubuntu1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Ubuntu.
See How to fix? for Ubuntu:21.04 relevant fixed versions and status.
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://people.ubuntu.com/~ubuntu-security/cve/CVE-2019-11727
- https://security-tracker.debian.org/tracker/CVE-2019-11727
- https://security.gentoo.org/glsa/201908-12
- https://www.mozilla.org/security/advisories/mfsa2019-21/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1552208
- https://access.redhat.com/errata/RHSA-2019:1951
- 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
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00006.html