SB2018040404 - Ubuntu update for screen-resolution-extra
Published: April 4, 2018
Security Bulletin ID
SB2018040404
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) Race condition (CVE-ID: CVE-2018-8885)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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 screenresolution-mechanism due to improper use of the PolicyKit D-Bus API. A local attacker can trigger race condition via a setuid or pkexec process that is mishandled in a PolicyKitService._check_permission call and bypass security restrictions.
Remediation
Install update from vendor's website.