PT-2018-18690 · Unknown+1 · Screen-Resolution-Extra+1

Published 2018-03-26 · Updated 2018-04-27 · CVE-2018-8885

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions screen-resolution-extra version 0.17.2

Description The issue is related to the screenresolution-mechanism in screen-resolution-extra, which does not properly utilize the PolicyKit D-Bus API. This allows local users to bypass intended access restrictions by exploiting a race condition. The race condition can be leveraged via a setuid or pkexec process that is mishandled in a PolicyKitService. check permission call.

Recommendations For screen-resolution-extra version 0.17.2, consider restricting access to the PolicyKitService. check permission function until a patch is available. As a temporary workaround, avoid using setuid or pkexec processes that may be mishandled by the PolicyKitService. check permission call. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2018-8885

USN-3607-1

Affected Products

Ubuntu

Screen-Resolution-Extra

References · 9

• https://usn.ubuntu.com/3607-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-8885 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-8885 · Security Note
• https://osv.dev/vulnerability/CVE-2018-8885 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-8885 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3607-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-8885 · Security Note
• https://osv.dev/vulnerability/USN-3607-1 · Vendor Advisory
• https://launchpad.net/bugs/1753772 · Note