=========================================================================== Ubuntu Security Notice USN-3499-1 November 29, 2017 exim4 vulnerability =========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 17.10 - Ubuntu 17.04 Summary: Exim could be made to crash if it received specially crafted network traffic. Software Description: - exim4: Exim is a mail transport agent Details: It was discovered that Exim incorrectly handled certain BDAT data headers. A remote attacker could possibly use this issue to cause Exim to crash, resulting in a denial of service. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.10: exim4-daemon-heavy 4.89-5ubuntu1.2 exim4-daemon-light 4.89-5ubuntu1.2 Ubuntu 17.04: exim4-daemon-heavy 4.88-5ubuntu1.3 exim4-daemon-light 4.88-5ubuntu1.3 In general, a standard system update will make all the necessary changes. References: https://www.ubuntu.com/usn/usn-3499-1 CVE-2017-16944 Package Information: https://launchpad.net/ubuntu/+source/exim4/4.89-5ubuntu1.2 https://launchpad.net/ubuntu/+source/exim4/4.88-5ubuntu1.3 --ujCoMpVvcHEbn25GdtIoHQXpEKJPfuSsK--