[gentoo-announce] [ GLSA 202105-01 ] Exim: Multiple vulnerabilities

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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 nvd.nist.gov/vuln/detail/CVE-2020-28007 [ 2 ] CVE-2020-28008 nvd.nist.gov/vuln/detail/CVE-2020-28008 [ 3 ] CVE-2020-28009 nvd.nist.gov/vuln/detail/CVE-2020-28009 [ 4 ] CVE-2020-28010 nvd.nist.gov/vuln/detail/CVE-2020-28010 [ 5 ] CVE-2020-28011 nvd.nist.gov/vuln/detail/CVE-2020-28011 [ 6 ] CVE-2020-28012 nvd.nist.gov/vuln/detail/CVE-2020-28012 [ 7 ] CVE-2020-28013 nvd.nist.gov/vuln/detail/CVE-2020-28013 [ 8 ] CVE-2020-28014 nvd.nist.gov/vuln/detail/CVE-2020-28014 [ 9 ] CVE-2020-28015 nvd.nist.gov/vuln/detail/CVE-2020-28015 [ 10 ] CVE-2020-28016 nvd.nist.gov/vuln/detail/CVE-2020-28016 [ 11 ] CVE-2020-28017 nvd.nist.gov/vuln/detail/CVE-2020-28017 [ 12 ] CVE-2020-28018 nvd.nist.gov/vuln/detail/CVE-2020-28018 [ 13 ] CVE-2020-28019 nvd.nist.gov/vuln/detail/CVE-2020-28019 [ 14 ] CVE-2020-28020 nvd.nist.gov/vuln/detail/CVE-2020-28020 [ 15 ] CVE-2020-28021 nvd.nist.gov/vuln/detail/CVE-2020-28021 [ 16 ] CVE-2020-28022 nvd.nist.gov/vuln/detail/CVE-2020-28022 [ 17 ] CVE-2020-28023 nvd.nist.gov/vuln/detail/CVE-2020-28023 [ 18 ] CVE-2020-28024 nvd.nist.gov/vuln/detail/CVE-2020-28024 [ 19 ] CVE-2020-28025 nvd.nist.gov/vuln/detail/CVE-2020-28025 [ 20 ] CVE-2020-28026 nvd.nist.gov/vuln/detail/CVE-2020-28026 [ 21 ] CVE-2021-27216 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:
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 security@gentoo.org or alternatively, you may file a bug at 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.
creativecommons.org/licenses/by-sa/2.5