A Mutt, NeoMutt: Denial of Service security update has been released for Gentoo Linux.

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Gentoo Linux Security Advisory GLSA 202105-05
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  https://security.gentoo.org/
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Severity: Low
Title: Mutt, NeoMutt: Denial of Service
Date: May 26, 2021
Bugs: #788388, #788391
ID: 202105-05

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Synopsis
========

A vulnerability in Mutt and NeoMutt could lead to a Denial of Service
condition.

Background
==========

Mutt is a small but very powerful text-based mail client.

NeoMutt is a command line mail reader (or MUA). It's a fork of Mutt
with added features.

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

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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 mail-client/mutt < 2.0.7 >= 2.0.7
2 mail-client/neomutt < 20210205-r1 >= 20210205-r1
-------------------------------------------------------------------
2 affected packages

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

It was discovered that Mutt, and NeoMutt did not properly handle
certain situations where an IMAP sequence set ends with a comma.

Impact
======

A remote attacker could entice a user to connect to a malicious IMAP
server to cause a Denial of Service condition, or other unspecified
impacts.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Mutt users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-client/mutt-2.0.7"

All NeoMutt users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot -v ">=mail-client/neomutt-20210205-r1"

References
==========

[ 1 ] CVE-2021-32055
  https://nvd.nist.gov/vuln/detail/CVE-2021-32055

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

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

  https://security.gentoo.org/glsa/202105-05

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 2021 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