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Apache » Http Server : Security Vulnerabilities

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# CVE ID CWE ID # of Exploits Vulnerability Type(s) Publish Date Update Date Score Gained Access Level Access Complexity Authentication Conf. Integ. Avail.
1 CVE-2022-37436 436 2023-01-17 2023-01-25
0.0
None ??? ??? ??? ??? ??? ???
Prior to Apache HTTP Server 2.4.55, a malicious backend can cause the response headers to be truncated early, resulting in some headers being incorporated into the response body. If the later headers have any security purpose, they will not be interpreted by the client.
2 CVE-2022-36760 444 2023-01-17 2023-01-25
0.0
None ??? ??? ??? ??? ??? ???
Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in mod_proxy_ajp 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 2.4.54 and prior versions.
3 CVE-2022-31813 345 Bypass 2022-06-09 2022-08-19
7.5
None Remote Low Not required Partial Partial Partial
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.
4 CVE-2022-30556 200 +Info 2022-06-09 2022-08-19
5.0
None Remote Low Not required Partial None None
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.
5 CVE-2022-30522 770 2022-06-09 2022-09-07
5.0
None Remote Low Not required None None Partial
If Apache HTTP Server 2.4.53 is configured to do transformations with mod_sed in contexts where the input to mod_sed may be very large, mod_sed may make excessively large memory allocations and trigger an abort.
6 CVE-2022-29404 770 DoS 2022-06-09 2022-08-24
5.0
None Remote Low Not required None None Partial
In Apache HTTP Server 2.4.53 and earlier, a malicious request to a lua script that calls r:parsebody(0) may cause a denial of service due to no default limit on possible input size.
7 CVE-2022-28615 190 2022-06-09 2022-08-24
6.4
None Remote Low Not required Partial None Partial
Apache HTTP Server 2.4.53 and earlier may crash or disclose information due to a read beyond bounds in ap_strcmp_match() 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 ap_strcmp_match() may hypothetically be affected.
8 CVE-2022-28614 190 2022-06-09 2022-08-24
5.0
None Remote Low Not required Partial None None
The ap_rwrite() 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 ap_rwrite() or ap_rputs(), such as with mod_luas r:puts() function. Modules compiled and distributed separately from Apache HTTP Server that use the 'ap_rputs' function and may pass it a very large (INT_MAX or larger) string must be compiled against current headers to resolve the issue.
9 CVE-2022-26377 444 2022-06-09 2022-08-24
5.0
None Remote Low Not required None Partial None
Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in mod_proxy_ajp 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.
10 CVE-2022-23943 787 2022-03-14 2022-10-26
7.5
None Remote Low Not required Partial Partial Partial
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.
11 CVE-2022-22721 190 Overflow 2022-03-14 2022-11-02
5.8
None Remote Medium Not required None Partial Partial
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.
12 CVE-2022-22720 444 2022-03-14 2022-11-02
7.5
None Remote Low Not required Partial Partial Partial
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
13 CVE-2022-22719 665 2022-03-14 2022-11-02
5.0
None Remote Low Not required None None Partial
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.
14 CVE-2021-44790 787 Overflow 2021-12-20 2022-11-02
7.5
None Remote Low Not required Partial Partial Partial
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.
15 CVE-2021-44224 476 2021-12-20 2022-11-02
6.4
None Remote Low Not required None Partial Partial
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).
16 CVE-2021-42013 22 Exec Code Dir. Trav. 2021-10-07 2022-10-05
7.5
None Remote Low Not required Partial Partial Partial
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.
17 CVE-2021-41773 22 Exec Code Dir. Trav. 2021-10-05 2022-10-28
4.3
None Remote Medium Not required Partial None None
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.
18 CVE-2021-41524 476 2021-10-05 2022-10-28
5.0
None Remote Low Not required None None Partial
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.
19 CVE-2021-40438 918 2021-09-16 2022-10-05
6.8
None Remote Medium Not required Partial Partial Partial
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.
20 CVE-2021-39275 787 2021-09-16 2022-10-05
7.5
None Remote Low Not required Partial Partial Partial
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.
21 CVE-2021-36160 125 2021-09-16 2022-10-18
5.0
None Remote Low Not required None None Partial
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).
22 CVE-2021-34798 476 2021-09-16 2022-10-28
5.0
None Remote Low Not required None None Partial
Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.
23 CVE-2021-33193 Bypass 2021-08-16 2022-10-18
5.0
None Remote Low Not required None Partial None
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.
24 CVE-2021-31618 476 2021-06-15 2021-12-10
5.0
None Remote Low Not required None None Partial
Apache HTTP Server protocol handler for the HTTP/2 protocol checks received request headers against the size limitations as configured for the server and used for the HTTP/1 protocol as well. On violation of these restrictions and HTTP response is sent to the client with a status code indicating why the request was rejected. This rejection response was not fully initialised in the HTTP/2 protocol handler if the offending header was the very first one received or appeared in a a footer. This led to a NULL pointer dereference on initialised memory, crashing reliably the child process. Since such a triggering HTTP/2 request is easy to craft and submit, this can be exploited to DoS the server. This issue affected mod_http2 1.15.17 and Apache HTTP Server version 2.4.47 only. Apache HTTP Server 2.4.47 was never released.
25 CVE-2021-30641 2021-06-10 2021-12-02
5.0
None Remote Low Not required None Partial None
Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'
26 CVE-2021-26691 787 Overflow 2021-06-10 2022-03-25
7.5
None Remote Low Not required Partial Partial Partial
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
27 CVE-2021-26690 476 DoS 2021-06-10 2021-12-01
5.0
None Remote Low Not required None None Partial
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
28 CVE-2020-35452 787 Overflow 2021-06-10 2021-12-01
6.8
None Remote Medium Not required Partial Partial Partial
Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team could create one, though some particular compiler and/or compilation option might make it possible, with limited consequences anyway due to the size (a single byte) and the value (zero byte) of the overflow
29 CVE-2020-13950 476 DoS 2021-06-10 2021-12-01
5.0
None Remote Low Not required None None Partial
Apache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service
30 CVE-2020-11993 444 2020-08-07 2021-06-06
4.3
None Remote Medium Not required None None Partial
Apache HTTP Server versions 2.4.20 to 2.4.43 When trace/debug was enabled for the HTTP/2 module and on certain traffic edge patterns, logging statements were made on the wrong connection, causing concurrent use of memory pools. Configuring the LogLevel of mod_http2 above "info" will mitigate this vulnerability for unpatched servers.
31 CVE-2020-11985 345 2020-08-07 2021-06-06
4.3
None Remote Medium Not required None Partial None
IP address spoofing when proxying using mod_remoteip and mod_rewrite For configurations using proxying with mod_remoteip and certain mod_rewrite rules, an attacker could spoof their IP address for logging and PHP scripts. Note this issue was fixed in Apache HTTP Server 2.4.24 but was retrospectively allocated a low severity CVE in 2020.
32 CVE-2020-11984 120 2020-08-07 2021-06-06
7.5
None Remote Low Not required Partial Partial Partial
Apache HTTP server 2.4.32 to 2.4.44 mod_proxy_uwsgi info disclosure and possible RCE
33 CVE-2020-9490 444 2020-08-07 2022-10-07
5.0
None Remote Low Not required None None Partial
Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via "H2Push off" will mitigate this vulnerability for unpatched servers.
34 CVE-2020-1934 908 2020-04-01 2022-04-26
5.0
None Remote Low Not required Partial None None
In Apache HTTP Server 2.4.0 to 2.4.41, mod_proxy_ftp may use uninitialized memory when proxying to a malicious FTP server.
35 CVE-2020-1927 601 2020-04-02 2022-07-25
5.8
None Remote Medium Not required Partial Partial None
In Apache HTTP Server 2.4.0 to 2.4.41, redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an an unexpected URL within the request URL.
36 CVE-2019-17567 444 2021-06-10 2021-12-02
5.0
None Remote Low Not required None Partial None
Apache HTTP Server versions 2.4.6 to 2.4.46 mod_proxy_wstunnel configured on an URL that is not necessarily Upgraded by the origin server was tunneling the whole connection regardless, thus allowing for subsequent requests on the same connection to pass through with no HTTP validation, authentication or authorization possibly configured.
37 CVE-2019-10098 601 2019-09-25 2021-06-14
5.8
None Remote Medium Not required Partial Partial None
In Apache HTTP server 2.4.0 to 2.4.39, Redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an unexpected URL within the request URL.
38 CVE-2019-10097 787 Overflow 2019-09-26 2021-07-07
6.0
None Remote Medium ??? Partial Partial Partial
In Apache HTTP Server 2.4.32-2.4.39, when mod_remoteip was configured to use a trusted intermediary proxy server using the "PROXY" protocol, a specially crafted PROXY header could trigger a stack buffer overflow or NULL pointer deference. This vulnerability could only be triggered by a trusted proxy and not by untrusted HTTP clients.
39 CVE-2019-10092 79 XSS 2019-09-26 2021-09-09
4.3
None Remote Medium Not required None Partial None
In Apache HTTP Server 2.4.0-2.4.39, a limited cross-site scripting issue was reported affecting the mod_proxy error page. An attacker could cause the link on the error page to be malformed and instead point to a page of their choice. This would only be exploitable where a server was set up with proxying enabled but was misconfigured in such a way that the Proxy Error page was displayed.
40 CVE-2019-10082 416 2019-09-26 2022-07-25
6.4
None Remote Low Not required Partial None Partial
In Apache HTTP Server 2.4.18-2.4.39, using fuzzed network input, the http/2 session handling could be made to read memory after being freed, during connection shutdown.
41 CVE-2019-10081 787 2019-08-15 2021-06-06
5.0
None Remote Low Not required None None Partial
HTTP/2 (2.4.20 through 2.4.39) very early pushes, for example configured with "H2PushResource", could lead to an overwrite of memory in the pushing request's pool, leading to crashes. The memory copied is that of the configured push link header values, not data supplied by the client.
42 CVE-2019-9517 770 DoS 2019-08-13 2023-01-19
7.8
None Remote Low Not required None None Complete
Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both.
43 CVE-2019-0220 706 2019-06-11 2022-07-25
5.0
None Remote Low Not required Partial None None
A vulnerability was found in Apache HTTP Server 2.4.0 to 2.4.38. When the path component of a request URL contains multiple consecutive slashes ('/'), directives such as LocationMatch and RewriteRule must account for duplicates in regular expressions while other aspects of the servers processing will implicitly collapse them.
44 CVE-2019-0217 362 Bypass 2019-04-08 2021-06-06
6.0
None Remote Medium ??? Partial Partial Partial
In Apache HTTP Server 2.4 release 2.4.38 and prior, a race condition in mod_auth_digest when running in a threaded server could allow a user with valid credentials to authenticate using another username, bypassing configured access control restrictions.
45 CVE-2019-0215 Bypass 2019-04-08 2021-06-06
6.0
None Remote Medium ??? Partial Partial Partial
In Apache HTTP Server 2.4 releases 2.4.37 and 2.4.38, a bug in mod_ssl when using per-location client certificate verification with TLSv1.3 allowed a client to bypass configured access control restrictions.
46 CVE-2019-0211 416 Exec Code 2019-04-08 2021-06-06
7.2
None Local Low Not required Complete Complete Complete
In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes or threads (including scripts executed by an in-process scripting interpreter) could execute arbitrary code with the privileges of the parent process (usually root) by manipulating the scoreboard. Non-Unix systems are not affected.
47 CVE-2019-0197 444 2019-06-11 2022-09-07
4.9
None Remote Medium ??? None Partial Partial
A vulnerability was found in Apache HTTP Server 2.4.34 to 2.4.38. When HTTP/2 was enabled for a http: host or H2Upgrade was enabled for h2 on a https: host, an Upgrade request from http/1.1 to http/2 that was not the first request on a connection could lead to a misconfiguration and crash. Server that never enabled the h2 protocol or that only enabled it for https: and did not set "H2Upgrade on" are unaffected by this issue.
48 CVE-2019-0196 416 2019-06-11 2021-06-06
5.0
None Remote Low Not required None None Partial
A vulnerability was found in Apache HTTP Server 2.4.17 to 2.4.38. Using fuzzed network input, the http/2 request handling could be made to access freed memory in string comparison when determining the method of a request and thus process the request incorrectly.
49 CVE-2018-17199 384 2019-01-30 2021-06-06
5.0
None Remote Low Not required None Partial None
In Apache HTTP Server 2.4 release 2.4.37 and prior, mod_session checks the session expiry time before decoding the session. This causes session expiry time to be ignored for mod_session_cookie sessions since the expiry time is loaded when the session is decoded.
50 CVE-2018-17189 400 2019-01-30 2021-07-06
5.0
None Remote Low Not required None None Partial
In Apache HTTP server versions 2.4.37 and prior, by sending request bodies in a slow loris way to plain resources, the h2 stream for that request unnecessarily occupied a server thread cleaning up that incoming data. This affects only HTTP/2 (mod_http2) connections.
Total number of vulnerabilities : 256   Page : 1 (This Page)2 3 4 5 6
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