SB2024012923 - Denial of service in NoMachine
Published: January 29, 2024
Security Bulletin ID
SB2024012923
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) UNIX Hard Link (CVE-ID: CVE-2023-39107)
CWE-ID: CWE-62 - UNIX Hard Link
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to overwrite arbitrary files on the system.
The vulnerability exists due to insecure permissions for the log directory in /Library/Application Support/NoMachine/var on macOS. A local user can create a hard link to a critical file on the system and overwrite it with root privileges, resulting in a denial of service attack.
Remediation
Install update from vendor's website.