VDB
CVE-2017-18078
CVE-2017-18078
PUBLISHED
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.
EPSS 0.08% · 24.6th percentile
Risk Scores
EPSS Score
0.08%
24.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:Pro:14.04:LTS | systemd | 0, 204-0ubuntu18, 204-0ubuntu19 |
| Ubuntu:Pro:16.04:LTS | systemd | 229-4ubuntu21.29, 229-4ubuntu21.31, 229-4ubuntu21.31+esm1 |
Exploit Intelligence
- http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html (nist-nvd)
- http://www.openwall.com/lists/oss-security/2018/01/29/3 (nist-nvd)
- https://github.com/systemd/systemd/issues/7736 (nist-nvd)
- https://www.exploit-db.com/exploits/43935/ (nist-nvd)
- systemd (systemd-tmpfiles) < 236 - fs.protected_hardlinks=0 Local Privilege Escalation Vulnerabil (0day-today)
- systemd (systemd-tmpfiles) < 236 - fs.protected_hardlinks=0 Local Privilege Escalation Vulnerabil (0day-today)
- glcve_test.go (github-poc)
- glcve_test.go (github-poc)
- glcve_test.go (github-poc)
- glcve_test.go (github-poc)
…and 1 more exploits
Timeline
- Jan 29, 2018 CVE Published
- Jan 31, 2018 PoC Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- May 2, 2022 EPSS Score
- May 13, 2022 CVE Updated
- Sep 5, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2017-18078 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2017-18078 third-party-advisory