[ GLSA 202208-18 ] Motion: Denial of service

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Gentoo Linux Security Advisory                           GLSA 202208-18
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                                           https://security.gentoo.org/
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 Severity: Low
    Title: Motion: Denial of service
     Date: August 10, 2022
     Bugs: #760714
       ID: 202208-18

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Synopsis
========

A vulnerability in Motion allows a remote attacker to cause denial of
service.

Background
==========

Motion is a program that monitors the video signal from one or more
cameras and is able to detect motions.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  media-video/motion         < 4.3.2                      >= 4.3.2

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

The Motion HTTP server does not correctly perform URL decoding. If the
HTTP server receives a request for a URL containing an incomplete
percent-encoded character, a flaw in parsing results in an infinite loop
trying to parse the rest of the character, which eventually results in a
denial of service condition when reading out-of-bounds.

Impact
======

A remote attacker can trigger a denial of service condition in Motion.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Motion users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=media-video/motion-4.3.2"

References
==========

[ 1 ] CVE-2020-26566
      https://nvd.nist.gov/vuln/detail/CVE-2020-26566

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

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

 https://security.gentoo.org/glsa/202208-18

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
[email protected] 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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