Vulnerability in Freedesktop Polkit
CVE-2016-2568
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.
EPSS: 0.004 (27.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Freedesktop Polkit
- Redhat Enterprise_linux — versions 6.0, 7.0
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory, Issue Tracking)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Mailing List, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2016-2568?
- CVE-2016-2568 is a high-severity vulnerability in Freedesktop Polkit, classified under Improper Encoding or Escaping of Output. CVSS score: 7.8/10. Published 2017-02-13.
- How severe is CVE-2016-2568?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2016-2568 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.