UBUNTU-CVE-2017-7838

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    UBUNTU-CVE-2017-7838

    Published: 15 Nov 2017Last Modified: 22 Apr 2026
    Upstream:
    CVE-2017-7838
    Aliases:
    USN-3477-1

    Summary:

    Details: Punycode format text will be displayed for entire qualified international domain names in some instances when a sub-domain triggers the punycode display instead of the primary domain being displayed in native script and the sub-domain only displaying as punycode. This could be used for limited spoofing attacks due to user confusion. This vulnerability affects Firefox < 57.

    References: https://ubuntu.com/security/CVE-2017-7838, 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-2017-7838

    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