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Gentoo Linux Security Advisory GLSA 202105-01
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https://security.gentoo.org/
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Severity: High
Title: Exim: Multiple vulnerabilities
Date: May 04, 2021
Bugs: #786945
ID: 202105-01
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Synopsis
========
Multiple vulnerabilities have been found in Exim, the worst of which
allows remote attackers to execute arbitrary code.
Background
==========
Exim is a message transfer agent (MTA) designed to be a a highly
configurable, drop-in replacement for sendmail.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 mail-mta/exim < 4.94.2 >= 4.94.2
Description
===========
Multiple vulnerabilities have been discovered in Exim. Please review
the CVE identifiers referenced below for details.
Impact
======
A remote attacker, by connecting to the SMTP listener daemon, could
possibly execute arbitrary code with the privileges of the process or
cause a Denial of Service condition. Furthermore, a local attacker
could perform symlink attacks to overwrite arbitrary files with the
privileges of the user running the application or escalate privileges.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Exim users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-mta/exim-4.94.2"
References
==========
[ 1 ] CVE-2020-28007
https://nvd.nist.gov/vuln/detail/CVE-2020-28007
[ 2 ] CVE-2020-28008
https://nvd.nist.gov/vuln/detail/CVE-2020-28008
[ 3 ] CVE-2020-28009
https://nvd.nist.gov/vuln/detail/CVE-2020-28009
[ 4 ] CVE-2020-28010
https://nvd.nist.gov/vuln/detail/CVE-2020-28010
[ 5 ] CVE-2020-28011
https://nvd.nist.gov/vuln/detail/CVE-2020-28011
[ 6 ] CVE-2020-28012
https://nvd.nist.gov/vuln/detail/CVE-2020-28012
[ 7 ] CVE-2020-28013
https://nvd.nist.gov/vuln/detail/CVE-2020-28013
[ 8 ] CVE-2020-28014
https://nvd.nist.gov/vuln/detail/CVE-2020-28014
[ 9 ] CVE-2020-28015
https://nvd.nist.gov/vuln/detail/CVE-2020-28015
[ 10 ] CVE-2020-28016
https://nvd.nist.gov/vuln/detail/CVE-2020-28016
[ 11 ] CVE-2020-28017
https://nvd.nist.gov/vuln/detail/CVE-2020-28017
[ 12 ] CVE-2020-28018
https://nvd.nist.gov/vuln/detail/CVE-2020-28018
[ 13 ] CVE-2020-28019
https://nvd.nist.gov/vuln/detail/CVE-2020-28019
[ 14 ] CVE-2020-28020
https://nvd.nist.gov/vuln/detail/CVE-2020-28020
[ 15 ] CVE-2020-28021
https://nvd.nist.gov/vuln/detail/CVE-2020-28021
[ 16 ] CVE-2020-28022
https://nvd.nist.gov/vuln/detail/CVE-2020-28022
[ 17 ] CVE-2020-28023
https://nvd.nist.gov/vuln/detail/CVE-2020-28023
[ 18 ] CVE-2020-28024
https://nvd.nist.gov/vuln/detail/CVE-2020-28024
[ 19 ] CVE-2020-28025
https://nvd.nist.gov/vuln/detail/CVE-2020-28025
[ 20 ] CVE-2020-28026
https://nvd.nist.gov/vuln/detail/CVE-2020-28026
[ 21 ] CVE-2021-27216
https://nvd.nist.gov/vuln/detail/CVE-2021-27216
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202105-01
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
secur...@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
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