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Gentoo Linux Security Advisory                           GLSA 202210-28
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                                           https://security.gentoo.org/
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 Severity: Low
    Title: exif: Denial of Service
     Date: October 31, 2022
     Bugs: #783522
       ID: 202210-28

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Synopsis
========

A vulnerability has been discovered in exif which could result in denial
of service.

Background
==========

libexif is a library for parsing, editing and saving Exif metadata from
images. exif is a small command line interface for libexif.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  media-gfx/exif             < 0.6.22                    >= 0.6.22

Description
===========

There is a bug in exif's XML output format which can result in a null
pointer dereference when outputting crafted JPEG EXIF data.

Impact
======

A crafted JPEG image can trigger a denial of service in the form of a
null pointer dereference.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All exif users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=media-gfx/exif-0.6.22"

References
==========

[ 1 ] CVE-2021-27815
      https://nvd.nist.gov/vuln/detail/CVE-2021-27815

Availability
============

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

 https://security.gentoo.org/glsa/202210-28

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 2022 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
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