The process_chat_input function in TinTin++ 1.97.9 and WinTin++ 1.97.9 allows remote attackers to cause a denial of service (application crash) via a YES message without a newline character, which triggers a NULL dereference.
http://www.vupen.com/english/advisories/2008/0449
http://www.securityfocus.com/bid/27660
http://www.securityfocus.com/archive/1/487687/100/0/threaded
http://securityreason.com/securityalert/3632
http://security.gentoo.org/glsa/glsa-201111-07.xml