SB2019010840 - UNIX symbolic link following in keepalived (Alpine package)
Published: January 8, 2019
Security Bulletin ID
SB2019010840
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 security vulnerability.
1) UNIX symbolic link following (CVE-ID: CVE-2018-19044)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a symlink following issue when writing data to a temporary file upon a call to PrintData or PrintStats. A local user can create a specially crafted symbolic link to a critical file on the system and overwrite it with privileges of the application, if fs.protected_symlinks is set to 0.
Successful exploitation of this vulnerability may result in privilege escalation.
Remediation
Install update from vendor's website.