UBUNTU-CVE-2017-7833

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    UBUNTU-CVE-2017-7833

    Published: 15 Nov 2017Last Modified: 22 Apr 2026
    Upstream:
    CVE-2017-7833
    Aliases:
    USN-3477-1

    Summary:

    Details: Some Arabic and Indic vowel marker characters can be combined with Latin characters in a domain name to eclipse the non-Latin character with some font sets on the addressbar. The non-Latin character will not be visible to most viewers. This allows for domain spoofing attacks because these combined domain names do not display as punycode. This vulnerability affects Firefox < 57.

    References: https://ubuntu.com/security/CVE-2017-7833, https://www.mozilla.org/en-US/security/advisories/mfsa2017-24/, https://ubuntu.com/security/notices/USN-3477-1, https://www.cve.org/CVERecord?id=CVE-2017-7833

    Affected packages

    Package

    Name: firefox

    Purl: pkg:deb/ubuntu/[email protected]+build4-0ubuntu0.14.04.4?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -57.0+build4-0ubuntu0.14.04.4

    Affected versions

    24.0+build1-0ubuntu1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High