MySQL: crash when loading data into geometry function PolyFromWKB() (MySQL Bug#51875)

The Gislinestring::initfromwkb function in sql/spatial.cc in MySQL 5.1 before 5.1.51 allows remote authenticated users to cause a denial of service server crash by calling the PolyFromWKB function with Well-Known Binary WKB data containing a crafted number of 1 line strings or 2 line points...