CVE-2017-7764 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  5.3 MEDIUM
Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.securityfocus.com/bid/99057 Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1038689 Third Party Advisory  VDB Entry 
http://www.unicode.org/reports/tr31/tr31-26.html#Aspirational_Use_Scripts Third Party Advisory 
https://access.redhat.com/errata/RHSA-2017:1440 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2017:1561 Third Party Advisory 
https://bugzilla.mozilla.org/show_bug.cgi?id=1364283 Exploit  Issue Tracking  Vendor Advisory 
https://www.debian.org/security/2017/dsa-3881 Third Party Advisory 
https://www.debian.org/security/2017/dsa-3918 Third Party Advisory 
https://www.mozilla.org/security/advisories/mfsa2017-15/ Vendor Advisory 
https://www.mozilla.org/security/advisories/mfsa2017-16/ Vendor Advisory 
https://www.mozilla.org/security/advisories/mfsa2017-17/ Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-20 Improper Input Validation cwe source acceptance level NIST  

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-7764
NVD Published Date:
06/11/2018
NVD Last Modified:
08/13/2018
Source:
Mozilla Corporation