Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.
lists.opensuse.org/opensuse-updates/2016-05/msg00131.html
seclists.org/fulldisclosure/2016/Mar/22
www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-pscp-sink-sscanf.html
www.securityfocus.com/bid/84296
www.securitytracker.com/id/1035257
github.com/tintinweb/pub/tree/master/pocs/cve-2016-2563
security.gentoo.org/glsa/201606-01