An NULL pointer dereference vulnerability exists in the handling of the MXIT protocol in Pidgin. Specially crafted MXIT data sent via the server could potentially result in a denial of service vulnerability. A malicious server can send a packet starting with a NULL byte triggering the vulnerability. External references: http://www.talosintel.com/reports/TALOS-2016-0137/ http://www.pidgin.im/news/security/?id=102