cve/2018/CVE-2018-6954.md

### [CVE-2018-6954](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6954)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### 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.

### POC

#### Reference
- https://github.com/systemd/systemd/issues/7986
- https://github.com/systemd/systemd/issues/7986

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/andir/nixos-issue-db-example
- https://github.com/flyrev/security-scan-ci-presentation
- https://github.com/lnick2023/nicenice
- https://github.com/qazbnm456/awesome-cve-poc
- https://github.com/xbl3/awesome-cve-poc_qazbnm456