SB2018021335 - Symlink attack in GNU systemd
Published: February 13, 2018
Security Bulletin ID
SB2018021335
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) Symlink attack (CVE-ID: CVE-2018-6954)
CWE-ID: CWE-61 - UNIX Symbolic Link (Symlink) Following
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear
The vulnerability allows a local attacker to launch symlink attack on the target system.
The weakness exists in the systemd-tmpfiles feature due to improper handling of symlinks in nonterminal path components. A local attacker can gain unauthorized access to arbitrary files.
Remediation
Install update from vendor's website.