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Vulnerability of GNOME Glib: file corruption via g_file_replace

Synthesis of the vulnerability 

A local attacker can create a symbolic link during the usage of g_file_replace(), in order to alter the pointed file, with privileges of GNOME Glib.
Impacted systems: Fedora, Ubuntu.
Severity of this alert: 1/4.
Creation date: 16/03/2021.
Références of this alert: CVE-2021-28153, FEDORA-2021-a1f51fc418, USN-4764-1, VIGILANCE-VUL-34853.

Description of the vulnerability 

A local attacker can create a symbolic link during the usage of g_file_replace(), in order to alter the pointed file, with privileges of GNOME Glib.
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This computer threat announce impacts software or systems such as Fedora, Ubuntu.

Our Vigil@nce team determined that the severity of this computer vulnerability is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this cybersecurity alert.

Solutions for this threat 

Fedora 33: new glib2 packages.
New packages are available:
  Fedora 33: glib2 2.66.8-1.fc33

Ubuntu: new libglib2.0-0 packages.
New packages are available:
  Ubuntu 20.10: libglib2.0-0 2.66.1-2ubuntu0.2
  Ubuntu 20.04 LTS: libglib2.0-0 2.64.6-1~ubuntu20.04.3
  Ubuntu 18.04 LTS: libglib2.0-0 2.56.4-0ubuntu0.18.04.8
  Ubuntu 16.04 LTS: libglib2.0-0 2.48.2-0ubuntu4.8
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