php: hang on numeric value 2.2250738585072011e-308 with x87 fpu

strtod.c, as used in the zendstrtod function in PHP 5.2 before 5.2.17 and 5.3 before 5.3.5, and other products, allows context-dependent attackers to cause a denial of service infinite loop via a certain floating-point value in scientific notation, which is not properly handled in x87 FPU...