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========================================================================== Ubuntu Security Notice USN-4934-2 May 06, 2021
exim4 vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 ESM - Ubuntu 14.04 ESM
Summary:
Several security issues were fixed in Exim.
Software Description: - 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 ESM: exim4-base 4.86.2-2ubuntu2.6+esm1 exim4-daemon-heavy 4.86.2-2ubuntu2.6+esm1 exim4-daemon-light 4.86.2-2ubuntu2.6+esm1
Ubuntu 14.04 ESM: exim4-base 4.82-3ubuntu2.4+esm3 exim4-daemon-heavy 4.82-3ubuntu2.4+esm3 exim4-daemon-light 4.82-3ubuntu2.4+esm3
In general, a standard system update will make all the necessary changes.
References: https://ubuntu.com/security/notices/USN-4934-2 https://ubuntu.com/security/notices/USN-4934-1 CVE-2020-28007, CVE-2020-28008, CVE-2020-28009, CVE-2020-28011, CVE-2020-28012, CVE-2020-28013, CVE-2020-28014, CVE-2020-28015, CVE-2020-28016, CVE-2020-28017, CVE-2020-28020, CVE-2020-28022, CVE-2020-28024, CVE-2020-28025, CVE-2020-28026, CVE-2021-27216
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