Multiple stack-based buffer overflows in the (1) conv_jistoeuc, (2) conv_euctojis, and (3) conv_sjistoeuc functions in codeconv.c in Claws Mail before 3.13.1 allow remote attackers to have unspecified impact via a crafted email, involving Japanese character set conversion.
https://security.gentoo.org/glsa/201606-11
http://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=3557
http://www.openwall.com/lists/oss-security/2015/12/22/2
http://www.openwall.com/lists/oss-security/2015/12/21/10
http://www.debian.org/security/2016/dsa-3452
http://www.claws-mail.org/news.php
http://lists.opensuse.org/opensuse-updates/2016-01/msg00000.html
http://git.claws-mail.org/?p=claws.git%3Ba=commit%3Bh=d390fa07f5548f3173dd9cc13b233db5ce934c82