CVEvulnerability
CVE-2017-18078
7.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2018-01-29
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 4.6 MEDIUM — AV:L/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-59
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 configurations
• systemd project systemd (< 237)
• debian debian linux 8.0
• opensuse leap 42.3
Related
Weakness · CWE (1)
- CWE-59 Improper Link Resolution Before File Access weakness
References
- http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.html Mailing List, Third Party Advisory
- http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry
- http://www.openwall.com/lists/oss-security/2018/01/29/3 Exploit, Mailing List, Third Party Advisory
- https://github.com/systemd/systemd/issues/7736 Exploit, Issue Tracking, Third Party Advisory
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E lists.apache.org
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E lists.apache.org
- https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html Mailing List, Third Party Advisory
- https://www.exploit-db.com/exploits/43935/ Exploit, Third Party Advisory, VDB Entry
- https://www.openwall.com/lists/oss-security/2018/01/29/4 Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.html Mailing List, Third Party Advisory
- http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry
- http://www.openwall.com/lists/oss-security/2018/01/29/3 Exploit, Mailing List, Third Party Advisory
- https://github.com/systemd/systemd/issues/7736 Exploit, Issue Tracking, Third Party Advisory
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E lists.apache.org
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E lists.apache.org
- https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html Mailing List, Third Party Advisory
- https://www.exploit-db.com/exploits/43935/ Exploit, Third Party Advisory, VDB Entry
- https://www.openwall.com/lists/oss-security/2018/01/29/4 Mailing List, Third Party Advisory