Medium severity5.3NVD Advisory· Published Jul 23, 2019· Updated Jun 17, 2026

CVE-2019-11727

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Mozilla Corporation/Firefoxllm-fuzzy2 versions
<68+ 1 more
- (no CPE)range: <68
- (no CPE)range: unspecified
Mozilla Corporation/Network Security Servicesllm-fuzzy
Range: <68
osv-coords68 versions
pkg:rpm/opensuse/enigmail&distro=openSUSE%20Leap%2015.0 pkg:rpm/opensuse/enigmail&distro=openSUSE%20Leap%2015.1 pkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.0 pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.1 pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/mozilla-nss&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.0 pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.1 pkg:rpm/suse/firefox-atk&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/firefox-cairo&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/firefox-gdk-pixbuf&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/firefox-glib2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/firefox-gtk3&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/firefox-harfbuzz&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/firefox-libffi&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/firefox-libffi-gcc5&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/firefox-pango&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Enterprise%20Storage%204 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Enterprise%20Storage%205 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP1 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSS pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSS pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20OpenStack%20Cloud%207 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/MozillaFirefox&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Enterprise%20Storage%204 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Enterprise%20Storage%205 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP1 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSS pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSS pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%207 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/mozilla-nspr&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015 pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP1
< 2.1.2-lp150.34.1+ 67 more
- (no CPE)range: < 2.1.2-lp150.34.1
- (no CPE)range: < 2.1.2-lp151.2.6.1
- (no CPE)range: < 128.5.1-1.1
- (no CPE)range: < 68.1.0-lp150.3.66.1
- (no CPE)range: < 68.1.0-lp151.2.14.1
- (no CPE)range: < 92.0-1.2
- (no CPE)range: < 3.69.1-1.2
- (no CPE)range: < 68.1.1-lp150.3.51.1
- (no CPE)range: < 68.1.1-lp151.2.13.1
- (no CPE)range: < 2.26.1-2.8.4
- (no CPE)range: < 1.15.10-2.13.4
- (no CPE)range: < 2.36.11-2.8.4
- (no CPE)range: < 2.54.3-2.14.7
- (no CPE)range: < 3.10.9-2.15.3
- (no CPE)range: < 1.7.5-2.7.4
- (no CPE)range: < 3.2.1.git259-2.3.3
- (no CPE)range: < 5.3.1+r233831-14.1
- (no CPE)range: < 1.40.14-2.7.4
- (no CPE)range: < 68-21.9.8
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-4.8.5
- (no CPE)range: < 68-4.8.5
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68-32.8.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-3.54.2
- (no CPE)range: < 68.1.0-3.54.2
- (no CPE)range: < 68.2.0-78.51.4
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 68.1.0-109.89.1
- (no CPE)range: < 4.21-29.6.1
- (no CPE)range: < 3.45-38.9.3
- (no CPE)range: < 68.1.1-3.51.1
- (no CPE)range: < 68.1.1-3.51.1

Patches

Vulnerability mechanics

References

bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions RequiredVendor Advisory
www.mozilla.org/security/advisories/mfsa2019-21/nvdVendor Advisory
lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.htmlnvd
lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.htmlnvd
lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.htmlnvd
lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.htmlnvd
lists.opensuse.org/opensuse-security-announce/2020-01/msg00006.htmlnvd
access.redhat.com/errata/RHSA-2019:1951nvd
security.gentoo.org/glsa/201908-12nvd

News mentions

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cvss	0.345
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000