UBUNTU-CVE-2017-7418

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    UBUNTU-CVE-2017-7418

    Published: 4 Apr 2017Last Modified: 22 Apr 2026
    Upstream:
    CVE-2017-7418

    Summary:

    Details: ProFTPD before 1.3.5e and 1.3.6 before 1.3.6rc5 controls whether the home directory of a user could contain a symbolic link through the AllowChrootSymlinks configuration option, but checks only the last path component when enforcing AllowChrootSymlinks. Attackers with local access could bypass the AllowChrootSymlinks control by replacing a path component (other than the last one) with a symbolic link. The threat model includes an attacker who is not granted full filesystem access by a hosting provider, but can reconfigure the home directory of an FTP user.

    References: https://ubuntu.com/security/CVE-2017-7418, https://github.com/proftpd/proftpd/commit/ecff21e0d0e84f35c299ef91d7fda088e516d4ed, https://github.com/proftpd/proftpd/commit/f59593e6ff730b832dbe8754916cb5c821db579f, https://github.com/proftpd/proftpd/pull/444/commits/349addc3be4fcdad9bd4ec01ad1ccd916c898ed8, https://www.cve.org/CVERecord?id=CVE-2017-7418

    Affected packages

    Package

    Name: proftpd-dfsg

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.3.5-2
    1.3.5a-1
    1.3.5a-1build1
    1.3.5a-1ubuntu0.1

    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
    UBUNTU-CVE-2017-7418 | CVE-DB