CVE-2017-18078

Published: Jan 29, 2018Modified: Nov 21, 2024

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: NVD

Description

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.

Affected (3)

Products: Systemd Project: Systemd · Debian: Debian Linux · Opensuse: Leap

Systemd Project

1 product

1 product

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Systemd Project Systemd	Before 237

Configuration B

1 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 8.0

Configuration C

1 vulnerable

Vulnerable Software	Affected Versions
Opensuse Leap	Version 42.3

Related CWEs

Improper Link Resolution Before File Access ('Link Following')

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

References (18)

http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.html

Source: cve@mitre.org

Mailing ListThird Party Advisory

http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html

Source: cve@mitre.org

ExploitThird Party AdvisoryVDB Entry

http://www.openwall.com/lists/oss-security/2018/01/29/3

Source: cve@mitre.org

ExploitMailing ListThird Party Advisory

https://github.com/systemd/systemd/issues/7736

Source: cve@mitre.org

ExploitIssue TrackingThird Party Advisory

https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E

Source: cve@mitre.org

https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E

Source: cve@mitre.org

https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://www.exploit-db.com/exploits/43935/

Source: cve@mitre.org

ExploitThird Party AdvisoryVDB Entry

https://www.openwall.com/lists/oss-security/2018/01/29/4

Source: cve@mitre.org

Mailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.html

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitThird Party AdvisoryVDB Entry

http://www.openwall.com/lists/oss-security/2018/01/29/3

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitMailing ListThird Party Advisory

https://github.com/systemd/systemd/issues/7736

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitIssue TrackingThird Party Advisory

https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E

Source: af854a3a-2127-422b-91ae-364da2661108

https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E

Source: af854a3a-2127-422b-91ae-364da2661108

https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

https://www.exploit-db.com/exploits/43935/

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitThird Party AdvisoryVDB Entry

https://www.openwall.com/lists/oss-security/2018/01/29/4

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

Timeline

No history available yet.