UBUNTU-CVE-2017-18078

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Source

https://ubuntu.com/security/CVE-2017-18078

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-18078.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2017-18078

Upstream

CVE-2017-18078

Published

2018-01-29T05:29:00Z

Modified

2025-09-08T16:44:33Z

Severity

7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
7.8 (High) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Ubuntu - low

Summary

[none]

Details

systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file.

References

Affected packages

Ubuntu:Pro:14.04:LTS / systemd

Package

Name: systemd
Purl: pkg:deb/ubuntu/systemd@204-5ubuntu20.31+esm2?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

Other

204-0ubuntu18

204-0ubuntu19

204-5ubuntu3

204-5ubuntu5

204-5ubuntu6

204-5ubuntu7

204-5ubuntu8

204-5ubuntu9

204-5ubuntu10

204-5ubuntu11

204-5ubuntu13

204-5ubuntu14

204-5ubuntu15

204-5ubuntu16

204-5ubuntu17

204-5ubuntu18

204-5ubuntu19

204-5ubuntu20

204-5ubuntu20.*

204-5ubuntu20.2

204-5ubuntu20.3

204-5ubuntu20.4

204-5ubuntu20.5

204-5ubuntu20.6

204-5ubuntu20.7

204-5ubuntu20.8

204-5ubuntu20.9

204-5ubuntu20.10

204-5ubuntu20.11

204-5ubuntu20.12

204-5ubuntu20.13

204-5ubuntu20.14

204-5ubuntu20.15

204-5ubuntu20.18

204-5ubuntu20.19

204-5ubuntu20.20

204-5ubuntu20.21

204-5ubuntu20.22

204-5ubuntu20.24

204-5ubuntu20.25

204-5ubuntu20.26

204-5ubuntu20.28

204-5ubuntu20.29

204-5ubuntu20.31

204-5ubuntu20.31+esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "gir1.2-gudev-1.0",
            "binary_version": "1:204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libgudev-1.0-0",
            "binary_version": "1:204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libgudev-1.0-dev",
            "binary_version": "1:204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libpam-systemd",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libsystemd-daemon-dev",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libsystemd-daemon0",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libsystemd-id128-0",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libsystemd-id128-dev",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libsystemd-journal-dev",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libsystemd-journal0",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libsystemd-login-dev",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libsystemd-login0",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libudev-dev",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "libudev1",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "python-systemd",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "systemd",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "systemd-services",
            "binary_version": "204-5ubuntu20.31+esm2"
        },
        {
            "binary_name": "udev",
            "binary_version": "204-5ubuntu20.31+esm2"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / systemd

Package

Name: systemd
Purl: pkg:deb/ubuntu/systemd@229-4ubuntu21.31+esm3?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

Other

225-1ubuntu9

227-2ubuntu1

227-2ubuntu2

228-1ubuntu2

228-2ubuntu1

228-2ubuntu2

228-3ubuntu1

228-4ubuntu1

228-4ubuntu2

228-5ubuntu1

228-5ubuntu2

228-5ubuntu3

228-6ubuntu1

229-1ubuntu2

229-1ubuntu4

229-2ubuntu1

229-3ubuntu1

229-3ubuntu2

229-4ubuntu1

229-4ubuntu4

229-4ubuntu5

229-4ubuntu6

229-4ubuntu7

229-4ubuntu8

229-4ubuntu10

229-4ubuntu11

229-4ubuntu12

229-4ubuntu13

229-4ubuntu16

229-4ubuntu17

229-4ubuntu19

229-4ubuntu20

229-4ubuntu21

229-4ubuntu21.*

229-4ubuntu21.1

229-4ubuntu21.2

229-4ubuntu21.3

229-4ubuntu21.4

229-4ubuntu21.5

229-4ubuntu21.6

229-4ubuntu21.8

229-4ubuntu21.9

229-4ubuntu21.10

229-4ubuntu21.15

229-4ubuntu21.16

229-4ubuntu21.17

229-4ubuntu21.19

229-4ubuntu21.21

229-4ubuntu21.22

229-4ubuntu21.23

229-4ubuntu21.27

229-4ubuntu21.28

229-4ubuntu21.29

229-4ubuntu21.31

229-4ubuntu21.31+esm1

229-4ubuntu21.31+esm3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libnss-myhostname",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "libnss-mymachines",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "libnss-resolve",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "libpam-systemd",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "libsystemd-dev",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "libsystemd0",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "libudev-dev",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "libudev1",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "systemd",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "systemd-container",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "systemd-coredump",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "systemd-journal-remote",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "systemd-sysv",
            "binary_version": "229-4ubuntu21.31+esm3"
        },
        {
            "binary_name": "udev",
            "binary_version": "229-4ubuntu21.31+esm3"
        }
    ]
}