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Vulnerability of GDK-PixBuf: integer overflow via gdk_pixbuf_gif_anim_iter_get_pixbuf

Synthesis of the vulnerability 

An attacker can trigger an integer overflow via gdk_pixbuf_gif_anim_iter_get_pixbuf() of GDK-PixBuf, in order to trigger a denial of service, and possibly to run code.
Impacted systems: Fedora, Ubuntu.
Severity of this alert: 2/4.
Creation date: 22/02/2021.
Références of this alert: CVE-2021-20240, FEDORA-2021-2e59756cbe, FEDORA-2021-755ba8968a, USN-4743-1, VIGILANCE-VUL-34643.

Description of the vulnerability 

An attacker can trigger an integer overflow via gdk_pixbuf_gif_anim_iter_get_pixbuf() of GDK-PixBuf, in order to trigger a denial of service, and possibly to run code.
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This computer weakness announce impacts software or systems such as Fedora, Ubuntu.

Our Vigil@nce team determined that the severity of this security alert is medium.

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

An attacker with a expert ability can exploit this vulnerability.

Solutions for this threat 

Fedora 33: new gdk-pixbuf2 packages.
New packages are available:
  Fedora 33: gdk-pixbuf2 2.42.2-2.fc33

Fedora 33: new gdk-pixbuf2-xlib packages.
New packages are available:
  Fedora 33: gdk-pixbuf2-xlib 2.40.2-2.fc33

Fedora 33: new mingw-gdk-pixbuf packages.
New packages are available:
  Fedora 33: mingw-gdk-pixbuf 2.42.2-1.fc33

Ubuntu: new libgdk-pixbuf2.0-0 packages.
New packages are available:
  Ubuntu 20.10: libgdk-pixbuf2.0-0 2.40.0+dfsg-5ubuntu0.2
  Ubuntu 20.04 LTS: libgdk-pixbuf2.0-0 2.40.0+dfsg-3ubuntu0.2
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