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.
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.