CVE-2016-2568

polkit: Program run via pkexec as unprivileged user can escape to parent session via TIOCSTI ioctl

Published Feb 13, 2017 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
pkexec, when used with --user nonpriv, allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2016-3642 pkexec, when used with --user nonpriv, allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics epss

{'score': 0.00188}

epss

{'score': 0.00293}

Type Values Removed Values Added
Metrics epss

{'score': 0.00124}

epss

{'score': 0.00188}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Oct 8, 2026, 9:14 PM
Reserved
Feb 26, 2016, 12:00 AM
Status
Modified
Published
Feb 13, 2017, 6:59 PM
Modified
Oct 8, 2026, 10:16 PM
Severity
Moderate
Public date
Jan 19, 2016, 12:00 AM