CVE Database›Document archive›CVE-2016-2781

CVE-2016-2781

coreutils: Non-privileged session can escape to the parent session in chroot

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Severity

Moderate

Red Hat Product Security

8.6

CVSS 3.0

Review impact separately from score.

Published · February 28, 2016

Updated · November 21, 2025

Description

It was found that chroot was vulnerable to TIOCSTI ioctl attacks, allowing the executed program to push characters to its TTY's input buffer. While being executed as a non-privileged user, a specially crafted program could force its parent TTY to enter commands, interpreted by the shell when chroot exits.

Statement

This issue affects the versions of coreutils as shipped with Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this issue as having Moderate security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 8.6
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS 2.0 · 6.2
AV:L/AC:H/Au:N/C:C/I:C/A:C

CWE-270 · Privilege Context Switching Error