CVE-2018-17955 Static tempfile name allows overwriting of arbitrary files
Local attackers can overwrite arbitrary files due to a static temporary filename in the SUSE YaST multipath configuration tool.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2018-17955?
CVE-2018-17955 is a low-severity path traversal vulnerability in SUSE yast2-multipath, published on 15 Mar 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
In yast2-multipath before version 4.1.1 a static temporary filename allows local attackers to overwrite files on systems without symlink protection
Which versions are affected by CVE-2018-17955?
It affects 1 product.
Linux distribution packages (5)
yast2-multipath SUSE:Linux Enterprise High Availability Extension 12 SP2 | All versions | 3.1.9-12.3.45 |
yast2-multipath SUSE:Linux Enterprise High Availability Extension 12 SP3 | All versions | 3.2.2-3.3.30 |
yast2-multipath SUSE:Linux Enterprise High Availability Extension 12 SP4 | All versions | 3.2.2-3.3.30 |
yast2-multipath SUSE:Linux Enterprise High Availability Extension 12 SP5 | All versions | 3.2.2-3.3.30 |
yast2-multipath openSUSE:Tumbleweed | All versions | 4.4.1-1.2 |
Products include Opensuse Yast2-Multipath.
How do I fix CVE-2018-17955?
Upgrade to a fixed version.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2018-17955 being exploited?
There is no known exploitation of CVE-2018-17955 in the wild and no public exploit code.
Sources
Also known as GHSA-pc25-pjvp-q59p, SUSE-SU-2020:3231-1, SUSE-SU-2021:0182-1, openSUSE-SU-2024:11533-1.