SB2019043003 - Security restrictions bypass in snapd
Published: April 30, 2019 Updated: January 29, 2020
Security Bulletin ID
SB2019043003
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) Race condition (CVE-ID: CVE-2019-11503)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition when processing symlinks using the chdir() function to restore a working directory. A local user can run snap-confine on a specially crafted symlink and restore files without necessary permissions.
Remediation
Install update from vendor's website.