CVE-2018-6954

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

systemd-tmpfiles in systemd through 237 mishandles symlinks present in non-terminal path components, which allows local users to obtain ownership of arbitrary files via vectors involving creation of a directory and a file under that directory, and later replacing that directory with a symlink. This occurs even if the fs.protected_symlinks sysctl is turned on.

References

https://github.com/systemd/systemd/issues/7986

https://usn.ubuntu.com/3816-1/

https://usn.ubuntu.com/3816-2/

http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html

https://lists.apache.org/thread.html/[email protected]%3Cissues.bookkeeper.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Cissues.bookkeeper.apache.org%3E

Details

Source: MITRE

Published: 2018-02-13

Updated: 2021-06-29

Risk Information

CVSS v2

Base Score: 7.2

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH

Tenable Plugins

View all (14 total)

IDNameProductFamilySeverity
141672EulerOS Virtualization 3.0.2.2 : systemd (EulerOS-SA-2020-2221)NessusHuawei Local Security Checks
high
129191EulerOS 2.0 SP3 : systemd (EulerOS-SA-2019-1998)NessusHuawei Local Security Checks
high
128926EulerOS Virtualization for ARM 64 3.0.2.0 : systemd (EulerOS-SA-2019-1923)NessusHuawei Local Security Checks
high
128924EulerOS 2.0 SP2 : systemd (EulerOS-SA-2019-1872)NessusHuawei Local Security Checks
high
128100EulerOS 2.0 SP5 : systemd (EulerOS-SA-2019-1808)NessusHuawei Local Security Checks
high
126473Photon OS 2.0: Systemd PHSA-2019-2.0-0166NessusPhotonOS Local Security Checks
high
125453openSUSE Security Update : systemd (openSUSE-2019-1450)NessusSuSE Local Security Checks
high
125244SUSE SLED12 / SLES12 Security Update : systemd (SUSE-SU-2019:1265-1)NessusSuSE Local Security Checks
high
125160Photon OS 1.0: Systemd PHSA-2019-1.0-0220NessusPhotonOS Local Security Checks
high
121464openSUSE Security Update : systemd (openSUSE-2019-98)NessusSuSE Local Security Checks
high
121304SUSE SLED15 / SLES15 Security Update : systemd (SUSE-SU-2019:0137-1)NessusSuSE Local Security Checks
high
119253Ubuntu 16.04 LTS : systemd regression (USN-3816-3)NessusUbuntu Local Security Checks
high
119043Ubuntu 16.04 LTS / 18.04 LTS / 18.10 : systemd vulnerability (USN-3816-2)NessusUbuntu Local Security Checks
high
118907Ubuntu 16.04 LTS / 18.04 LTS / 18.10 : systemd vulnerabilities (USN-3816-1)NessusUbuntu Local Security Checks
high