Zero-Second Cheat Glyph 零秒漏洞

On April 4th, 2015, developer Benedikt Allendorf posted screenshots on Google+ showing a Glyph Hack with a speed bonus of 214748% which produced over 2,000 items.

2015年4月4日,开发者Benedikt Allendorf在G+上展示了一个速度加成214748%,产生超过2000个物品的一个Glyph Hack。

Allendorf later explained that he had modified the Ingress Scanner app to tell Niantic's servers that he completed the Hack in -20 seconds.

Allendorf 随后解释说他修改了Scanner程序,告诉Niantic的服务器,他在负20秒内完成了这次Hack

Niantic's servers converted this to a ratio of -1.0. It then cast the negative 32-bit floating-point number into an unsigned 32-bit integer. Because the twos complement representation of a negative number has each bit set to 1, this returned a speed bonus of the maximum 32-bit unsigned integer value of 2,147,483,647. The server divided this by 1,000 to convert from milliseconds and used it to calculate the item drops.

Niantic的服务器把-20s转换成了-1的比率。随后又被从一个负的32位的浮点数转换成无符号的32位整数。因为每一位都为1,所以转换成的最大的32位整数值2,147,483,647。服务器随后用这个数除以1000并计算物品掉落。

The bug was quickly patched, and the cheat is no longer possible.

这个Bug很快被修复,不可再现了。

来源(https://ingress.fandom.com/wiki/Glyph_Hacking)
Zero-Second Cheat
On April 4th, 2015, developer Benedikt Allendorf posted screenshots on Google+ showing a Glyph Hack with a speed bonus of 214748% which produced over 2,000 items.[4]
Allendorf later explained that he had modified the Ingress Scanner app to tell Niantic's servers that he completed the Hack in -20 seconds.
Niantic's servers converted this to a ratio of -1.0. It then cast the negative 32-bit floating-point number into an unsigned 32-bit integer. Because the twos complement representation of a negative number has each bit set to 1, this returned a speed bonus of the maximum 32-bit unsigned integer value of 2,147,483,647. The server divided this by 1,000 to convert from milliseconds and used it to calculate the item drops.
The bug was quickly patched, and the cheat is no longer possible.
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