CVE-2017-18078

CVSS V2 Medium 4.6 CVSS V3 High 7.8
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.
Overview
  • CVE ID
  • CVE-2017-18078
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2018-01-29T05:29:00
  • Last Modified Date
  • 2022-01-31T18:24:42
Weakness Enumerations
CWE URL
CWE-59 http://cwe.mitre.org/data/definitions/59.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* 1 OR 237
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:P/I:P/A:P
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 4.6
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 7.8
  • Base Severity
  • HIGH
  • Exploitability Score
  • 1.8
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://github.com/systemd/systemd/issues/7736 Exploit Issue Tracking 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://www.openwall.com/lists/oss-security/2018/01/29/3 Exploit Mailing List Third Party Advisory
http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html Exploit Third Party Advisory VDB Entry
http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html Mailing List Third Party Advisory
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E Third Party Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2017-18078
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18078
History
Created Old Value New Value Data Type Notes
2022-05-10 06:35:42 Added to TrackCVE
2022-12-03 01:34:02 2018-01-29T05:29Z 2018-01-29T05:29:00 CVE Published Date updated
2022-12-03 01:34:02 2022-01-31T18:24:42 CVE Modified Date updated
2022-12-03 01:34:02 Analyzed Vulnerability Status updated