epan/dissectors/packet-smtp.c in the SMTP dissector in Wireshark 1.10.x before 1.10.12 and 1.12.x before 1.12.3 uses an incorrect length value for certain string-append operations, which allows remote attackers to cause a denial of service (application crash) via a crafted packet.
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=10823
http://www.wireshark.org/security/wnpa-sec-2015-04.html
http://www.securityfocus.com/bid/71916
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:022
http://secunia.com/advisories/62612
http://lists.opensuse.org/opensuse-updates/2015-01/msg00053.html