Home / mailings [gentoo-announce] [ GLSA 202310-13 ] GNU Mailutils: unexpected processsing of escape sequences
Posted on 19 October 2023
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Gentoo Linux Security Advisory GLSA 202310-13
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https://security.gentoo.org/
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Severity: High
Title: GNU Mailutils: unexpected processsing of escape sequences
Date: October 19, 2023
Bugs: #802867
ID: 202310-13
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Synopsis
========
A vulnerability has been discovered in Mailutils where escape sequences
are processed in a context where this may lead to RCE.
Background
==========
GNU Mailutils is a collection of mail-related utilities, including an
IMAP4 server (imap4d) and a Mail User Agent (mail).
Affected packages
=================
Package Vulnerable Unaffected
------------------ ------------ ------------
net-mail/mailutils < 3.12-r3 >= 3.12-r3
Description
===========
A vulnerability has been discovered in GNU Mailutils. Please review the
CVE identifier referenced below for details.
Impact
======
mail(1) from mailutils would process escape sequences (like ~!
shellcommand) in message bodies piped/redirected in. This creates an RCE
if some part of the message body is under an attacker's control.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Mailutils users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-mail/mailutils-3.12-r3"
References
==========
[ 1 ] CVE-2021-32749
https://nvd.nist.gov/vuln/detail/CVE-2021-32749
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202310-13
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
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