CVE-2018-6556

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    CVE-2018-6556

    Published: 10 Aug 2018Last Modified: 8 Jul 2026

    Summary:

    Details: lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn't otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2.

    References: http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html, http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.html, http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.html, http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.html, https://security.gentoo.org/glsa/201808-02, https://usn.ubuntu.com/usn/usn-3730-1, https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591, https://bugzilla.suse.com/show_bug.cgi?id=988348

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 823765e50bf4df2f2365bd2590768676634919b7
    Fixed -None

    Affected versions

    lxc-3.0.1
    lxc-3.0.0

    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
    CVE-2018-6556 | CVE-DB