BIT-APACHE-2021-26691 Apache HTTP Server mod_session response handling heap overflow

In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow...

BIT-APACHE-2021-30641 Unexpected URL matching with 'MergeSlashes OFF'

Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'...

BIT-APACHE-2021-33193 Request splitting via HTTP/2 method injection and mod_proxy

A crafted method sent through HTTP/2 will bypass validation and be forwarded by modproxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48...

BIT-APACHE-2021-34798 NULL pointer dereference in httpd core

Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier...

BIT-APACHE-2021-36160 mod_proxy_uwsgi out of bound read

A carefully crafted request uri-path can cause modproxyuwsgi to read above the allocated memory and crash DoS. This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 inclusive...

BIT-APACHE-2021-39275 ap_escape_quotes buffer overflow

apescapequotes may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may. This issue affects Apache HTTP Server 2.4.48 and earlier...

BIT-APACHE-2021-40438 mod_proxy SSRF

A crafted request uri-path can cause modproxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier...

BIT-APACHE-2021-41773 Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49

A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default...

BIT-APACHE-2021-42013 Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)

It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default...

BIT-APACHE-2021-44224 Possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier

A crafted URI sent to httpd configured as a forward proxy ProxyRequests on can cause a crash NULL pointer dereference or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint Server Side Request Forgery...

BIT-APACHE-2021-44790 Possible buffer overflow when parsing multipart content in mod_lua of Apache HTTP Server 2.4.51 and earlier

A carefully crafted request body can cause a buffer overflow in the modlua multipart parser r:parsebody called from Lua scripts. The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier...

BIT-APACHE-2022-22719 mod_lua Use of uninitialized value of in r:parsebody

A carefully crafted request body can cause a read to a random memory area which could cause the process to crash. This issue affects Apache HTTP Server 2.4.52 and earlier...

BIT-APACHE-2022-23943 mod_sed: Read/write beyond bounds

Out-of-bounds Write vulnerability in modsed of Apache HTTP Server allows an attacker to overwrite heap memory with possibly attacker provided data. This issue affects Apache HTTP Server 2.4 version 2.4.52 and prior versions...

BIT-APACHE-2022-26377 mod_proxy_ajp: Possible request smuggling

Inconsistent Interpretation of HTTP Requests 'HTTP Request Smuggling' vulnerability in modproxyajp of Apache HTTP Server allows an attacker to smuggle requests to the AJP server it forwards requests to. This issue affects Apache HTTP Server Apache HTTP Server 2.4 version 2.4.53 and prior versions...

BIT-APACHE-2022-28614 read beyond bounds via ap_rwrite()

The aprwrite function in Apache HTTP Server 2.4.53 and earlier may read unintended memory if an attacker can cause the server to reflect very large input using aprwrite or aprputs, such as with modluas r:puts function. Modules compiled and distributed separately from Apache HTTP Server that use t...

BIT-APACHE-2022-28615 Read beyond bounds in ap_strcmp_match()

Apache HTTP Server 2.4.53 and earlier may crash or disclose information due to a read beyond bounds in apstrcmpmatch when provided with an extremely large input buffer. While no code distributed with the server can be coerced into such a call, third-party modules or lua scripts that use...

BIT-APACHE-2022-29404 Denial of service in mod_lua r:parsebody

In Apache HTTP Server 2.4.53 and earlier, a malicious request to a lua script that calls r:parsebody0 may cause a denial of service due to no default limit on possible input size...

BIT-APACHE-2022-30522 mod_sed denial of service

If Apache HTTP Server 2.4.53 is configured to do transformations with modsed in contexts where the input to modsed may be very large, modsed may make excessively large memory allocations and trigger an abort...

BIT-APACHE-2022-30556 Information Disclosure in mod_lua with websockets

Apache HTTP Server 2.4.53 and earlier may return lengths to applications calling r:wsread that point past the end of the storage allocated for the buffer...

BIT-APACHE-2022-31813 mod_proxy X-Forwarded-For dropped by hop-by-hop mechanism

Apache HTTP Server 2.4.53 and earlier may not send the X-Forwarded- headers to the origin server based on client side Connection header hop-by-hop mechanism. This may be used to bypass IP based authentication on the origin server/application...