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CVE-2018-6556

CVE-2018-6556 · The lxc-user-nic component of LXC allows unprivileged users to open arbitrary files

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 3.3 · Low · EPSS 0.3% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • lxc

    Versions
    • ≥ 2.0.9, < 2.0*: Affected (custom)
    • ≥ 3.0.0, < 3.0*: Affected; ≥ 3.0.2: Not affected (custom)

    No fix published

  • lxc Debian:12

    Affected ranges
    • ECOSYSTEM: < 1:2.0.9-6.1

    Update to 1:2.0.9-6.1

  • lxc Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:2.0.9-6.1

    Update to 1:2.0.9-6.1

  • lxc Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:2.0.9-6.1

    Update to 1:2.0.9-6.1

  • lxc Ubuntu:18.04:LTS

    Versions
    • 2.1.0-0ubuntu1
    • 2.1.1-0ubuntu1
    • 3.0.0~beta1-0ubuntu3
    • 3.0.0~beta2-0ubuntu2
    • 3.0.0~beta3-0ubuntu1
    • 3.0.0~beta4-0ubuntu1
    • 3.0.0-0ubuntu1
    • 3.0.0-0ubuntu2
    • 3.0.1-0ubuntu1~18.04.1
    Affected ranges
    • ECOSYSTEM: < 3.0.1-0ubuntu1~18.04.2

    Update to 3.0.1-0ubuntu1~18.04.2

Original sources

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