- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202105-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: Exim: Multiple vulnerabilities Date: May 04, 2021 Bugs: #786945 ID: 202105-01 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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 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