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Vulnerability Details : CVE-2017-7764

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.
Publish Date : 2018-06-11 Last Update Date : 2018-08-13
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 20

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2017:1440: firefox security update (Critical) oval:com.redhat.rhsa:def:20171440 unix
RHSA-2017:1561: thunderbird security update (Important) oval:com.redhat.rhsa:def:20171561 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2017-7764

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 8.0 * * * Version Details Vulnerabilities
2 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
3 Application Mozilla Firefox * * * * Version Details Vulnerabilities
4 Application Mozilla Firefox Esr * * * * Version Details Vulnerabilities
5 Application Mozilla Thunderbird * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 2
Mozilla Firefox 1
Mozilla Firefox Esr 1
Mozilla Thunderbird 1

- References For CVE-2017-7764

http://www.securitytracker.com/id/1038689
SECTRACK 1038689
http://www.securityfocus.com/bid/99057
BID 99057 Mozilla Firefox Multiple Security Vulnerabilities Release Date:2017-07-26
https://access.redhat.com/errata/RHSA-2017:1440
REDHAT RHSA-2017:1440
https://www.debian.org/security/2017/dsa-3918
DEBIAN DSA-3918
https://www.debian.org/security/2017/dsa-3881
DEBIAN DSA-3881
https://access.redhat.com/errata/RHSA-2017:1561
REDHAT RHSA-2017:1561
http://www.unicode.org/reports/tr31/tr31-26.html#Aspirational_Use_Scripts
https://www.mozilla.org/security/advisories/mfsa2017-16/ CONFIRM
https://bugzilla.mozilla.org/show_bug.cgi?id=1364283 CONFIRM
https://www.mozilla.org/security/advisories/mfsa2017-15/ CONFIRM
https://www.mozilla.org/security/advisories/mfsa2017-17/ CONFIRM

- Metasploit Modules Related To CVE-2017-7764

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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