Stack-based buffer overflow in the add_line_buffer function in TinTin++ 1.97.9 and WinTin++ 1.97.9 allows remote attackers to execute arbitrary code via a long chat message, related to conversion from LF to CRLF.

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.

TinTin++ 1.97.9 and WinTin++ 1.97.9 open files on the basis of an inbound file-transfer request, before the user has an opportunity to decline the request, which allows remote attackers to truncate arbitrary files in the top level of a home directory.