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Gentoo Linux Security Advisory                           GLSA 202310-11
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: less: Denial service
     Date: October 10, 2023
     Bugs: #893530
       ID: 202310-11

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Synopsis
========

A filtering bypass in less may allow denial of service.

Background
==========

less is a pager and text file viewer.

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

Package        Vulnerable    Unaffected
-------------  ------------  ------------
sys-apps/less  < 608-r2      >= 608-r2

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

less suffered from a flaw in its terminal escape sequence handling which
made its filtering incomplete.

Impact
======

Malicious input could clear the terminal output or otherwise manipulate
it with faked interactions.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All less users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-apps/less-608-r2"

References
==========

[ 1 ] CVE-2022-46663
      https://nvd.nist.gov/vuln/detail/CVE-2022-46663

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

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

 https://security.gentoo.org/glsa/202310-11

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 2023 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