Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1520.2 USN-4934-1: Exim vulnerabilities 7 May 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Exim Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Root Compromise -- Existing Account Modify Arbitrary Files -- Existing Account Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2021-27216 CVE-2020-28026 CVE-2020-28025 CVE-2020-28024 CVE-2020-28023 CVE-2020-28022 CVE-2020-28021 CVE-2020-28020 CVE-2020-28019 CVE-2020-28018 CVE-2020-28017 CVE-2020-28016 CVE-2020-28015 CVE-2020-28014 CVE-2020-28013 CVE-2020-28012 CVE-2020-28011 CVE-2020-28010 CVE-2020-28009 CVE-2020-28008 CVE-2020-28007 Reference: ESB-2021.1512 Original Bulletin: https://ubuntu.com/security/notices/USN-4934-1 https://ubuntu.com/security/notices/USN-4934-2 Comment: This bulletin contains two (2) Ubuntu security advisories. Revision History: May 7 2021: Added advisory for Ubuntu 16.04 ESM and 14.04 ESM May 5 2021: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4934-1: Exim vulnerabilities 04 May 2021 Several security issues were fixed in Exim. Releases o Ubuntu 21.04 o Ubuntu 20.10 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS Packages o exim4 - Exim is a mail transport agent Details It was discovered that Exim contained multiple security issues. An attacker could use these issues to cause a denial of service, execute arbitrary code remotely, obtain sensitive information, or escalate local privileges. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04 o exim4-daemon-heavy - 4.94-15ubuntu1.2 o exim4-base - 4.94-15ubuntu1.2 o exim4-daemon-light - 4.94-15ubuntu1.2 Ubuntu 20.10 o exim4-daemon-heavy - 4.94-7ubuntu1.2 o exim4-base - 4.94-7ubuntu1.2 o exim4-daemon-light - 4.94-7ubuntu1.2 Ubuntu 20.04 o exim4-daemon-heavy - 4.93-13ubuntu1.5 o exim4-base - 4.93-13ubuntu1.5 o exim4-daemon-light - 4.93-13ubuntu1.5 Ubuntu 18.04 o exim4-daemon-heavy - 4.90.1-1ubuntu1.8 o exim4-base - 4.90.1-1ubuntu1.8 o exim4-daemon-light - 4.90.1-1ubuntu1.8 In general, a standard system update will make all the necessary changes. References o CVE-2020-28022 o CVE-2020-28026 o CVE-2020-28009 o CVE-2020-28012 o CVE-2020-28018 o CVE-2020-28014 o CVE-2020-28015 o CVE-2020-28024 o CVE-2020-28017 o CVE-2020-28025 o CVE-2020-28011 o CVE-2020-28008 o CVE-2020-28013 o CVE-2020-28007 o CVE-2020-28010 o CVE-2020-28019 o CVE-2020-28016 o CVE-2020-28023 o CVE-2020-28020 o CVE-2020-28021 o CVE-2021-27216 - -------------------------------------------------------------------------------- USN-4934-2: Exim vulnerabilities 06 May 2021 Several security issues were fixed in Exim. Releases o Ubuntu 16.04 ESM o Ubuntu 14.04 ESM Packages o exim4 - Exim is a mail transport agent Details USN-4934-1 fixed several vulnerabilities in Exim. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. CVE-2020-28026 only affected Ubuntu 16.04 ESM. Original advisory details: It was discovered that Exim contained multiple security issues. An attacker could use these issues to cause a denial of service, execute arbitrary code remotely, obtain sensitive information, or escalate local privileges. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 o exim4-daemon-heavy - 4.86.2-2ubuntu2.6+esm1 Available with UA Infra or UA Desktop o exim4-base - 4.86.2-2ubuntu2.6+esm1 Available with UA Infra or UA Desktop o exim4-daemon-light - 4.86.2-2ubuntu2.6+esm1 Available with UA Infra or UA Desktop Ubuntu 14.04 o exim4-daemon-heavy - 4.82-3ubuntu2.4+esm3 Available with UA Infra or UA Desktop o exim4-base - 4.82-3ubuntu2.4+esm3 Available with UA Infra or UA Desktop o exim4-daemon-light - 4.82-3ubuntu2.4+esm3 Available with UA Infra or UA Desktop In general, a standard system update will make all the necessary changes. References o CVE-2020-28011 o CVE-2020-28009 o CVE-2021-27216 o CVE-2020-28022 o CVE-2020-28025 o CVE-2020-28026 o CVE-2020-28024 o CVE-2020-28014 o CVE-2020-28007 o CVE-2020-28016 o CVE-2020-28020 o CVE-2020-28013 o CVE-2020-28008 o CVE-2020-28015 o CVE-2020-28017 o CVE-2020-28012 Related notices o USN-4934-1 : exim4, exim4-base, exim4-daemon-light, exim4-daemon-heavy - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYJSLxuNLKJtyKPYoAQhNwhAAo02EKOEXIKZDB7jDH8RSW/QyMEU5Fsty h2R6YOU0HukpXKuTMeeVRZefc71NBu+i2rn73WGWUwgXB69Lu1h+o5ZUd2a3opBu syvL71wazej1iSS2RyBmI8k50hhPIRWjObFVqfFQVCodm+gmz4R4Z+FD8OlDnQhU gxjxFzKlT2ka6XWIBWJCgIkO0QCisVFsrK8OrHoYl8W8ALs+7wq0ckW0sI6/fSjE 0mKgJGYwMD2ZXiALCewUAN78+WfQ2ELA03zTYaJeYsGtsi90n633uD9LoGyHWbN9 eidc1CY2GcSMLLrP8yVXT4y0xGZwAuesp5s8n2lRbvmmX9Jc8TSQmVrMLcd5Uboi YRJDBZ5Ss3yFruCbK36H9cZLml/mdmMv+dt0z+IiptxqCPa0Xr+GQmTYKl3vunuF j26Mz3QQlIT/WozehPeJ5xl9wf09J7oTTvtQn1k3LV4umBoy//4SJzzc/t5VBOxJ UDtTvGIzvdo+EBFhlNht6VImTh29UDKR3Mzi9D2D2CHKm30i5ADfdFhaNGVzesDb JDGUg6BkXxXk17ksfVLi5ytrUibmwMzXI6TGg2oEDI9XU7sTC6i1wKLdJDvLWK2E g6RWqJ4ZZPrMh4kjFDIbgxOO8eS1le4MdcLqqqsfx5lbVWCasUBQ6mKBL7XDdElw lRWhB5DnJsY= =YG7P -----END PGP SIGNATURE-----