Medium severity5.3NVD Advisory· Published Jun 11, 2018· Updated Jun 17, 2026
CVE-2017-7764
CVE-2017-7764
Description
Characters from the "Canadian Syllabics" unicode block can be mixed with characters from other unicode blocks in the addressbar instead of being rendered as their raw "punycode" form, allowing for domain name spoofing attacks through character confusion. The current Unicode standard allows characters from "Aspirational Use Scripts" such as Canadian Syllabics to be mixed with Latin characters in the "moderately restrictive" IDN profile. We have changed Firefox behavior to match the upcoming Unicode version 10.0 which removes this category and treats them as "Limited Use Scripts.". This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
51- osv-coords48 versionspkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/suse/firefox-gcc5&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3pkg:rpm/suse/firefox-gcc5&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/firefox-gcc5&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATApkg:rpm/suse/firefox-gcc5&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/firefox-gcc5&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/firefox-libffi-gcc5&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3pkg:rpm/suse/firefox-libffi-gcc5&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/firefox-libffi-gcc5&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATApkg:rpm/suse/firefox-libffi-gcc5&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/firefox-libffi-gcc5&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3pkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATApkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP2pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20Raspberry%20Pi%2012%20SP2pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20OpenStack%20Cloud%206pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP2pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATApkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20Raspberry%20Pi%2012%20SP2pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP2pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%206pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATApkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP4pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Package%20Hub%2012
< 91.1.1-1.1+ 47 more
- (no CPE)range: < 91.1.1-1.1
- (no CPE)range: < 5.3.1+r233831-7.1
- (no CPE)range: < 5.3.1+r233831-7.1
- (no CPE)range: < 5.3.1+r233831-7.1
- (no CPE)range: < 5.3.1+r233831-7.1
- (no CPE)range: < 5.3.1+r233831-7.1
- (no CPE)range: < 5.3.1+r233831-7.1
- (no CPE)range: < 5.3.1+r233831-7.1
- (no CPE)range: < 5.3.1+r233831-7.1
- (no CPE)range: < 5.3.1+r233831-7.1
- (no CPE)range: < 5.3.1+r233831-7.1
- (no CPE)range: < 52-24.3.44
- (no CPE)range: < 52-24.3.44
- (no CPE)range: < 52-24.3.44
- (no CPE)range: < 52-24.3.44
- (no CPE)range: < 52-24.3.44
- (no CPE)range: < 52-31.1
- (no CPE)range: < 52-31.1
- (no CPE)range: < 52-31.1
- (no CPE)range: < 52-31.1
- (no CPE)range: < 52-31.1
- (no CPE)range: < 52-31.1
- (no CPE)range: < 52-31.1
- (no CPE)range: < 52-31.1
- (no CPE)range: < 52-31.1
- (no CPE)range: < 52.2.0esr-108.3
- (no CPE)range: < 52.2.0esr-72.5.2
- (no CPE)range: < 52.2.0esr-72.5.2
- (no CPE)range: < 52.2.0esr-72.5.2
- (no CPE)range: < 52.2.0esr-72.5.2
- (no CPE)range: < 52.2.0esr-108.3
- (no CPE)range: < 52.2.0esr-108.3
- (no CPE)range: < 52.2.0esr-108.3
- (no CPE)range: < 52.2.0esr-108.3
- (no CPE)range: < 52.2.0esr-72.5.2
- (no CPE)range: < 52.2.0esr-108.3
- (no CPE)range: < 52.2.0esr-108.3
- (no CPE)range: < 52.2.0esr-108.3
- (no CPE)range: < 52.2.0esr-72.5.2
- (no CPE)range: < 52.2.0esr-108.3
- (no CPE)range: < 52.2.0esr-108.3
- (no CPE)range: < 3.29.5-47.3.2
- (no CPE)range: < 3.29.5-47.3.2
- (no CPE)range: < 3.29.5-47.3.2
- (no CPE)range: < 3.29.5-47.3.2
- (no CPE)range: < 3.29.5-47.3.2
- (no CPE)range: < 3.29.5-47.3.2
- (no CPE)range: < 52.2-36.1
unspecified+ 1 more
- (no CPE)range: unspecified
- (no CPE)range: unspecified
- Range: unspecified
Patches
Vulnerability mechanics
References
11- bugzilla.mozilla.org/show_bug.cginvdExploitIssue TrackingVendor Advisory
- www.securityfocus.com/bid/99057nvdThird Party AdvisoryVDB Entry
- www.securitytracker.com/id/1038689nvdThird Party AdvisoryVDB Entry
- www.unicode.org/reports/tr31/tr31-26.htmlnvdThird Party Advisory
- access.redhat.com/errata/RHSA-2017:1440nvdThird Party Advisory
- access.redhat.com/errata/RHSA-2017:1561nvdThird Party Advisory
- www.debian.org/security/2017/dsa-3881nvdThird Party Advisory
- www.debian.org/security/2017/dsa-3918nvdThird Party Advisory
- www.mozilla.org/security/advisories/mfsa2017-15/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2017-16/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2017-17/nvdVendor Advisory
News mentions
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