mDNSResponder in the Bonjour Namespace Provider in Apple Bonjour for Windows before 1.0.5 allows attackers to cause a denial of service (NULL pointer dereference and application crash) by resolving a crafted .local domain name that contains a long label.
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.