UBUNTU-CVE-2018-6556

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Source
https://ubuntu.com/security/CVE-2018-6556
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-6556.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-6556
Upstream
Downstream
Related
Published
2018-08-06T16:00:00Z
Modified
2025-07-18T16:44:30Z
Severity
  • 3.3 (Low) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
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

Affected packages

Ubuntu:18.04:LTS / lxc

Package

Name
lxc
Purl
pkg:deb/ubuntu/lxc@3.0.1-0ubuntu1~18.04.2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.0.1-0ubuntu1~18.04.2

Affected versions

2.*

2.1.0-0ubuntu1
2.1.1-0ubuntu1

3.*

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "liblxc-common",
            "binary_version": "3.0.1-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "liblxc-common-dbgsym",
            "binary_version": "3.0.1-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "liblxc-dev",
            "binary_version": "3.0.1-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "liblxc1",
            "binary_version": "3.0.1-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "liblxc1-dbgsym",
            "binary_version": "3.0.1-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "libpam-cgfs",
            "binary_version": "3.0.1-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "libpam-cgfs-dbgsym",
            "binary_version": "3.0.1-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "lxc",
            "binary_version": "3.0.1-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "lxc-dev",
            "binary_version": "3.0.1-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "lxc-utils",
            "binary_version": "3.0.1-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "lxc-utils-dbgsym",
            "binary_version": "3.0.1-0ubuntu1~18.04.2"
        },
        {
            "binary_name": "lxc1",
            "binary_version": "3.0.1-0ubuntu1~18.04.2"
        }
    ],
    "availability": "No subscription required"
}