UBUNTU-CVE-2017-7839

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    UBUNTU-CVE-2017-7839

    Published: 15 Nov 2017Last Modified: 22 Apr 2026
    Upstream:
    CVE-2017-7839
    Aliases:
    USN-3477-1

    Summary:

    Details: Control characters prepended before "javascript:" URLs pasted in the addressbar can cause the leading characters to be ignored and the pasted JavaScript to be executed instead of being blocked. This could be used in social engineering and self-cross-site-scripting (self-XSS) attacks where users are convinced to copy and paste text into the addressbar. This vulnerability affects Firefox < 57.

    References: https://ubuntu.com/security/CVE-2017-7839, 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-2017-7839

    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