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Gentoo Linux Security Advisory                           GLSA 202008-05
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: gThumb: Arbitrary code execution
     Date: August 08, 2020
     Bugs: #712932
       ID: 202008-05

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Synopsis
=======
A buffer overflow in gThumb might allow remote attacker(s) to execute
arbitrary code.

Background
=========
gThumb is an image viewer and browser for GNOME.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  media-gfx/gthumb             < 3.10.0                  >= 3.10.0

Description
==========
A heap-based buffer overflow in gThumb's
_cairo_image_surface_create_from_jpeg() function, located in
extensions/cairo_io/cairo-image-surface-jpeg.c was discovered.

Impact
=====
A remote attacker could entice a user to open a specially crafted image
file using gThumb, possibly resulting in execution of arbitrary code
with the privileges of the process or a Denial of Service condition.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All gThumb users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=media-gfx/gthumb-3.10.0"

References
=========
[ 1 ] CVE-2019-20326
      https://nvd.nist.gov/vuln/detail/CVE-2019-20326

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/202008-05

Concerns?
========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
======
Copyright 2020 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5