CVE-2018-8885: Race Condition

Published Mar 26, 2018
·
Updated

screenresolution-mechanism in screen-resolution-extra 0.17.2 does not properly use the PolicyKit D-Bus API, which allows local users to bypass intended access restrictions by leveraging a race condition via a setuid or pkexec process that is mishandled in a PolicyKitService.checkpermission call.

Affected Software

7 affected componentsFixes available
ubuntu/screen-resolution-extra<0.17.1.1
0.17.1.1
ubuntu/screen-resolution-extra<0.17.1.1~14.04.1
0.17.1.1~14.04.1
ubuntu/screen-resolution-extra<0.17.1.1~16.04.1
0.17.1.1~16.04.1
Canonical Screen-resolution-extra=0.17.2
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=17.10

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/screen-resolution-extra to a version that resolves this vulnerability.

    Fixed in 0.17.1.1
  2. Upgrade

    Upgrade ubuntu/screen-resolution-extra to a version that resolves this vulnerability.

    Fixed in 0.17.1.1~14.04.1
  3. Upgrade

    Upgrade ubuntu/screen-resolution-extra to a version that resolves this vulnerability.

    Fixed in 0.17.1.1~16.04.1

Event History

Mar 26, 2018
CVE Published
via Ubuntu·12:00 AM
Mar 28, 2018
CVE Published
via MITRE·08:00 PM
Data Sourced
via MITRE·08:00 PM
Description
Data Sourced
via NVD·08:29 PM
DescriptionSeverityWeaknessAffected Software
Jan 11, 2024
Data Sourced
via Debian·11:10 PM
DescriptionAffected Software
Data Sourced
via Launchpad·11:10 PM
Description

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2018-8885?

CVE-2018-8885 is classified as a high severity vulnerability due to its ability to allow local users to bypass access restrictions.

2

How do I fix CVE-2018-8885?

To fix CVE-2018-8885, upgrade the screen-resolution-extra package to version 0.17.1.1 or later.

3

Which versions of screen-resolution-extra are affected by CVE-2018-8885?

CVE-2018-8885 affects screen-resolution-extra version 0.17.2 and earlier versions.

4

Is my system vulnerable to CVE-2018-8885?

If you are running screen-resolution-extra version 0.17.2 or lower, your system is vulnerable to CVE-2018-8885.

5

What platforms are affected by CVE-2018-8885?

CVE-2018-8885 affects Ubuntu operating systems running the vulnerable versions of the screen-resolution-extra package.

Company

Resources

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