=============
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 <meh@devco.re> 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.
Would fix other vulnerabilities and bugs as well :-)
514.gz [^] (10,334 bytes) 2018-12-04 10:32
130.pdf [^] (29,446 bytes) 2019-07-11 14:51 
