CVE-2018-6557
HIGHbase-files Privilege Escalation via MOTD Update Script (Ubuntu 18.04/18.10)
Title source: llmDescription
The MOTD update script in the base-files package in Ubuntu 18.04 LTS before 10.1ubuntu2.2, and Ubuntu 18.10 before 10.1ubuntu6 incorrectly handled temporary files. A local attacker could use this issue to cause a denial of service, or possibly escalate privileges if kernel symlink restrictions were disabled.
References (3)
Core 3
Core References
Vendor Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3748-1/
Broken Link, Third Party Advisory, VDB Entry vdb-entry
x_refsource_sectrack
http://www.securitytracker.com/id/1041530
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/105148
Scores
CVSS v3
7.0
EPSS
0.0005
EPSS Percentile
16.0%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-59
Status
published
Products (3)
base-files_project/base-files
10.1ubuntu2.2
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
18.10
Published
Aug 21, 2018
Tracked Since
Feb 18, 2026