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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (27.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Freedesktop Polkit
- Red Hat Enterprise Linux — versions 6.0, 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2016/02/26/3 (mailing-list, Mailing List, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- access.redhat.com/security/cve/cve-2016-2568 (Third Party Advisory)
- ubuntu.com/security/CVE-2016-2568 (Third Party Advisory)
- bugs.debian.org/cgi-bin/bugreport.cgi (Mailing List, Third Party Advisory)
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.