The ProcessSSDPRequest function in minissdp.c in the SSDP handler in MiniUPnP MiniUPnPd before 1.4 allows remote attackers to cause a denial of service (service crash) via a crafted request that triggers a buffer over-read.
https://community.rapid7.com/servlet/servlet.FileDownload?file=00P1400000cCaFb
https://community.rapid7.com/servlet/JiveServlet/download/2150-1-16596/SecurityFlawsUPnP.pdf