A gthumb security update has been released for Debian GNU/Linux 9 LTS to address a heap-based buffer overflow in _cairo_image_surface_create_from_jpeg() in extensions/cairo_io/cairo-image-surface-jpeg.c.

DLA 2749-1: gthumb security update

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Debian LTS Advisory DLA-2749-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Thorsten Alteholz
August 29, 2021   https://wiki.debian.org/LTS
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Package : gthumb
Version : 3:3.4.4.1-5+deb9u2
CVE ID : CVE-2019-20326

An issue has been found in gthumb, an image viewer and browser.
A heap-based buffer overflow in _cairo_image_surface_create_from_jpeg()
in extensions/cairo_io/cairo-image-surface-jpeg.c allows attackers to
cause a crash and potentially execute arbitrary code via a crafted JPEG
file.

For Debian 9 stretch, this problem has been fixed in version
3:3.4.4.1-5+deb9u2.

We recommend that you upgrade your gthumb packages.

For the detailed security status of gthumb please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/gthumb

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS