Apache 2.4.x < 2.4.49 Multiple Vulnerabilities

According to its banner, the version of Apache running on the remote host is 2.4.x prior to 2.4.49. It is, therefore, affected by multiple vulnerabilities:

• A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. (CVE-2021-33193)

• Malformed requests may cause the server to dereference a NULL pointer. (CVE-2021-34798)

• A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). (CVE-2021-36160)

• ap_escape_quotes() may write beyond the end of a buffer when given malicious input. (CVE-2021-39275)

• A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. (CVE-2021-40438)

Note that the scanner has not tested for these issues but has instead relied only on the application’s self-reported version number.