This affects the Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27.
發生在對 OPTIONS 處理出問題：
Optionsbleed is a use after free error in Apache HTTP that causes a corrupted Allow header to be constructed in response to HTTP OPTIONS requests. This can leak pieces of arbitrary memory from the server process that may contain secrets. The memory pieces change after multiple requests, so for a vulnerable host an arbitrary number of memory chunks can be leaked.