Apache HTTP Server Multiple Vulnerabilities

Multiple vulnerabilities have been identified in Apache HTTP Server, which can be exploited by malicious people to cause a DoS (Denial of Service).

1. An error within the mod_cgid module when handling certain input can be exploited to cause a hang of a child process.
2. An error within WinNT MPM can be exploited to trigger a memory leak by sending specially crafted requests. Successful exploitation requires the server is configured using the default AcceptFilter setting.
   
   Note: This vulnerability only affects Apache HTTP Server running on Windows NT operating systems.
3. An error when handling HTTP headers within the mod_proxy module can be exploited to cause a crash of the worker by sending a specially crafted request.
   Successful exploitation requires the server to be configured as a reverse proxy.
4. An error when within mod_deflate module can be exploited to consume memory and CPU resources.
   Successful exploitation requires the server to be configured to use request body decompression.