Vulnerabilities (CVE)

Filtered by vendor Apache Subscribe
Filtered by product Http Server
Total 299 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2022-23943 4 Apache, Debian, Fedoraproject and 1 more 5 Http Server, Debian Linux, Fedora and 2 more 2023-11-07 7.5 HIGH 9.8 CRITICAL
Out-of-bounds Write vulnerability in mod_sed 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.
CVE-2022-22721 5 Apache, Apple, Debian and 2 more 8 Http Server, Mac Os X, Macos and 5 more 2023-11-07 5.8 MEDIUM 9.1 CRITICAL
If LimitXMLRequestBody is set to allow request bodies larger than 350MB (defaults to 1M) on 32 bit systems an integer overflow happens which later causes out of bounds writes. This issue affects Apache HTTP Server 2.4.52 and earlier.
CVE-2022-22720 5 Apache, Apple, Debian and 2 more 8 Http Server, Mac Os X, Macos and 5 more 2023-11-07 7.5 HIGH 9.8 CRITICAL
Apache HTTP Server 2.4.52 and earlier fails to close inbound connection when errors are encountered discarding the request body, exposing the server to HTTP Request Smuggling
CVE-2022-22719 5 Apache, Apple, Debian and 2 more 7 Http Server, Mac Os X, Macos and 4 more 2023-11-07 5.0 MEDIUM 7.5 HIGH
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.
CVE-2021-44790 7 Apache, Apple, Debian and 4 more 14 Http Server, Mac Os X, Macos and 11 more 2023-11-07 7.5 HIGH 9.8 CRITICAL
A carefully crafted request body can cause a buffer overflow in the mod_lua 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.
CVE-2021-44224 6 Apache, Apple, Debian and 3 more 12 Http Server, Mac Os X, Macos and 9 more 2023-11-07 6.4 MEDIUM 8.2 HIGH
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). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).
CVE-2021-42013 4 Apache, Fedoraproject, Netapp and 1 more 6 Http Server, Fedora, Cloud Backup and 3 more 2023-11-07 7.5 HIGH 9.8 CRITICAL
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 configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.
CVE-2021-41773 4 Apache, Fedoraproject, Netapp and 1 more 4 Http Server, Fedora, Cloud Backup and 1 more 2023-11-07 4.3 MEDIUM 7.5 HIGH
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 configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.
CVE-2021-41524 4 Apache, Fedoraproject, Netapp and 1 more 4 Http Server, Fedora, Cloud Backup and 1 more 2023-11-07 5.0 MEDIUM 7.5 HIGH
While fuzzing the 2.4.49 httpd, a new null pointer dereference was detected during HTTP/2 request processing, allowing an external source to DoS the server. This requires a specially crafted request. The vulnerability was recently introduced in version 2.4.49. No exploit is known to the project.
CVE-2021-40438 7 Apache, Debian, F5 and 4 more 14 Http Server, Debian Linux, F5os and 11 more 2023-11-07 6.8 MEDIUM 9.0 CRITICAL
A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier.
CVE-2021-39275 6 Apache, Debian, Fedoraproject and 3 more 11 Http Server, Debian Linux, Fedora and 8 more 2023-11-07 7.5 HIGH 9.8 CRITICAL
ap_escape_quotes() 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.
CVE-2021-36160 6 Apache, Broadcom, Debian and 3 more 13 Http Server, Brocade Fabric Operating System Firmware, Debian Linux and 10 more 2023-11-07 5.0 MEDIUM 7.5 HIGH
A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).
CVE-2021-34798 8 Apache, Broadcom, Debian and 5 more 18 Http Server, Brocade Fabric Operating System Firmware, Debian Linux and 15 more 2023-11-07 5.0 MEDIUM 7.5 HIGH
Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.
CVE-2021-33193 4 Apache, Fedoraproject, Oracle and 1 more 5 Http Server, Fedora, Secure Backup and 2 more 2023-11-07 5.0 MEDIUM 7.5 HIGH
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. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.
CVE-2021-32792 3 Apache, Fedoraproject, Openidc 3 Http Server, Fedora, Mod Auth Openidc 2023-11-07 4.3 MEDIUM 6.1 MEDIUM
mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In mod_auth_openidc before version 2.4.9, there is an XSS vulnerability in when using `OIDCPreservePost On`.
CVE-2021-32791 3 Apache, Fedoraproject, Openidc 3 Http Server, Fedora, Mod Auth Openidc 2023-11-07 4.3 MEDIUM 5.9 MEDIUM
mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In mod_auth_openidc before version 2.4.9, the AES GCM encryption in mod_auth_openidc uses a static IV and AAD. It is important to fix because this creates a static nonce and since aes-gcm is a stream cipher, this can lead to known cryptographic issues, since the same key is being reused. From 2.4.9 onwards this has been patched to use dynamic values through usage of cjose AES encryption routines.
CVE-2021-32786 3 Apache, Fedoraproject, Openidc 3 Http Server, Fedora, Mod Auth Openidc 2023-11-07 5.8 MEDIUM 6.1 MEDIUM
mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In versions prior to 2.4.9, `oidc_validate_redirect_url()` does not parse URLs the same way as most browsers do. As a result, this function can be bypassed and leads to an Open Redirect vulnerability in the logout functionality. This bug has been fixed in version 2.4.9 by replacing any backslash of the URL to redirect with slashes to address a particular breaking change between the different specifications (RFC2396 / RFC3986 and WHATWG). As a workaround, this vulnerability can be mitigated by configuring `mod_auth_openidc` to only allow redirection whose destination matches a given regular expression.
CVE-2021-30641 4 Apache, Debian, Fedoraproject and 1 more 6 Http Server, Debian Linux, Fedora and 3 more 2023-11-07 5.0 MEDIUM 5.3 MEDIUM
Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'
CVE-2021-26691 5 Apache, Debian, Fedoraproject and 2 more 8 Http Server, Debian Linux, Fedora and 5 more 2023-11-07 7.5 HIGH 9.8 CRITICAL
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
CVE-2021-26690 4 Apache, Debian, Fedoraproject and 1 more 6 Http Server, Debian Linux, Fedora and 3 more 2023-11-07 5.0 MEDIUM 7.5 HIGH
Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can cause a NULL pointer dereference and crash, leading to a possible Denial Of Service