CVE-2018-6789 ============= There is a buffer overflow in base64d(), if some pre-conditions are met. Using a handcrafted message, remote code execution seems to be possible. A patch exists already and is being tested. Currently we're unsure about the severity, we *believe*, an exploit is difficult. A mitigation isn't known. Timeline (UTC) -------------- * 2018-02-05 Report from Meh Chang via exim-security mailing list * 2018-02-06 Request CVE on https://cveform.mitre.org/ (heiko) CVE-2018-6789 * 2018-02-07 Announcement to the public via exim-users, exim-maintainers mailing lists and on oss-security mailing list * 2018-02-08 16:50 Grant restricted access to the security repo for distro maintainers * 2018-02-09 One distro breaks the embargo * 2018-02-10 18:00 Grant public access to the our official git repo.