SB2017122401 - Security restrictions bypass in systemd
Published: December 24, 2017
Security Bulletin ID
SB2017122401
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2017-18078)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to bypass security restrictions on the target system.
The weakness exists in the systemd-tmpfiles due to improper access restrictions. A local attacker can bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access.
Remediation
Install update from vendor's website.