CVE Vulnerabilities

CVE-2019-12450

Incorrect Default Permissions

Published: May 29, 2019 | Modified: Nov 07, 2023
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
6.6 MODERATE
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Ubuntu
MEDIUM

file_copy_fallback in gio/gfile.c in GNOME GLib 2.15.0 through 2.61.1 does not properly restrict file permissions while a copy operation is in progress. Instead, default permissions are used.

Weakness

During installation, installed file permissions are set to allow anyone to modify those files.

Affected Software

Name Vendor Start Version End Version
Glib Gnome 2.15.0 (including) 2.61.1 (including)
Red Hat Enterprise Linux 7 RedHat glib2-0:2.56.1-7.el7 *
Red Hat Enterprise Linux 7 RedHat ibus-0:1.5.17-11.el7 *
Red Hat Enterprise Linux 8 RedHat glib2-0:2.56.4-7.el8 *
Red Hat OpenShift Do RedHat openshiftdo/odo-init-image-rhel7:1.1.3-2 *
Glib2.0 Ubuntu bionic *
Glib2.0 Ubuntu cosmic *
Glib2.0 Ubuntu devel *
Glib2.0 Ubuntu disco *
Glib2.0 Ubuntu trusty *
Glib2.0 Ubuntu trusty/esm *
Glib2.0 Ubuntu xenial *

Potential Mitigations

  • Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
  • Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

References