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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-2021-30641 2021-06-10 2021-07-17
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'
2 CVE-2021-26691 787 Overflow 2021-06-10 2021-07-17
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
3 CVE-2021-26690 476 DoS 2021-06-10 2021-07-17
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
4 CVE-2020-35452 787 Overflow 2021-06-10 2021-07-17
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
5 CVE-2020-13950 476 DoS 2021-06-10 2021-07-17
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
6 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.
7 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.
8 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
9 CVE-2020-9490 444 2020-08-07 2021-06-06
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.
10 CVE-2020-1934 908 2020-04-01 2021-07-09
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.
11 CVE-2020-1927 601 2020-04-02 2021-07-09
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.
12 CVE-2019-17567 444 2021-06-10 2021-07-17
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.
13 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.
14 CVE-2019-10092 79 XSS 2019-09-26 2021-06-06
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.
15 CVE-2019-10082 416 2019-09-26 2021-06-06
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.
16 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.
17 CVE-2019-0220 706 2019-06-11 2021-06-06
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.
18 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.
19 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.
20 CVE-2019-0197 444 2019-06-11 2021-06-06
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.
21 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.
22 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.
23 CVE-2018-11763 2018-09-25 2021-06-06
4.3
None Remote Medium Not required None None Partial
In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol.
24 CVE-2018-1333 400 DoS 2018-06-18 2021-06-06
5.0
None Remote Low Not required None None Partial
By specially crafting HTTP/2 requests, workers would be allocated 60 seconds longer than necessary, leading to worker exhaustion and a denial of service. Fixed in Apache HTTP Server 2.4.34 (Affected 2.4.18-2.4.30,2.4.33).
25 CVE-2018-1312 287 2018-03-26 2021-06-06
6.8
None Remote Medium Not required Partial Partial Partial
In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent to prevent reply attacks was not correctly generated using a pseudo-random seed. In a cluster of servers using a common Digest authentication configuration, HTTP requests could be replayed across servers by an attacker without detection.
26 CVE-2018-1303 125 DoS 2018-03-26 2021-06-06
5.0
None Remote Low Not required None None Partial
A specially crafted HTTP request header could have crashed the Apache HTTP Server prior to version 2.4.30 due to an out of bound read while preparing data to be cached in shared memory. It could be used as a Denial of Service attack against users of mod_cache_socache. The vulnerability is considered as low risk since mod_cache_socache is not widely used, mod_cache_disk is not concerned by this vulnerability.
27 CVE-2018-1302 476 2018-03-26 2021-06-06
4.3
None Remote Medium Not required None None Partial
When an HTTP/2 stream was destroyed after being handled, the Apache HTTP Server prior to version 2.4.30 could have written a NULL pointer potentially to an already freed memory. The memory pools maintained by the server make this vulnerability hard to trigger in usual configurations, the reporter and the team could not reproduce it outside debug builds, so it is classified as low risk.
28 CVE-2018-1301 119 Overflow 2018-03-26 2021-06-06
4.3
None Remote Medium Not required None None Partial
A specially crafted request could have crashed the Apache HTTP Server prior to version 2.4.30, due to an out of bound access after a size limit is reached by reading the HTTP header. This vulnerability is considered very hard if not impossible to trigger in non-debug mode (both log and build level), so it is classified as low risk for common server usage.
29 CVE-2018-1283 2018-03-26 2021-06-06
3.5
None Remote Medium ??? None Partial None
In Apache httpd 2.4.0 to 2.4.29, when mod_session is configured to forward its session data to CGI applications (SessionEnv on, not the default), a remote user may influence their content by using a "Session" header. This comes from the "HTTP_SESSION" variable name used by mod_session to forward its data to CGIs, since the prefix "HTTP_" is also used by the Apache HTTP Server to pass HTTP header fields, per CGI specifications.
30 CVE-2017-15715 20 2018-03-26 2021-06-06
6.8
None Remote Medium Not required Partial Partial Partial
In Apache httpd 2.4.0 to 2.4.29, the expression specified in <FilesMatch> could match '$' to a newline character in a malicious filename, rather than matching only the end of the filename. This could be exploited in environments where uploads of some files are are externally blocked, but only by matching the trailing portion of the filename.
31 CVE-2017-9798 416 2017-09-18 2021-06-06
5.0
None Remote Low Not required Partial None None
Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user's .htaccess file, or if httpd.conf has certain misconfigurations, aka Optionsbleed. This affects the Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27. The attacker sends an unauthenticated OPTIONS HTTP request when attempting to read secret data. This is a use-after-free issue and thus secret data is not always sent, and the specific data depends on many factors including configuration. Exploitation with .htaccess can be blocked with a patch to the ap_limit_section function in server/core.c.
32 CVE-2017-9788 200 DoS +Info 2017-07-13 2021-06-06
6.4
None Remote Low Not required Partial None Partial
In Apache httpd before 2.2.34 and 2.4.x before 2.4.27, the value placeholder in [Proxy-]Authorization headers of type 'Digest' was not initialized or reset before or between successive key=value assignments by mod_auth_digest. Providing an initial key with no '=' assignment could reflect the stale value of uninitialized pool memory used by the prior request, leading to leakage of potentially confidential information, and a segfault in other cases resulting in denial of service.
33 CVE-2017-7679 119 Overflow 2017-06-20 2021-06-06
7.5
None Remote Low Not required Partial Partial Partial
In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, mod_mime can read one byte past the end of a buffer when sending a malicious Content-Type response header.
34 CVE-2017-3167 287 Bypass 2017-06-20 2021-06-06
7.5
None Remote Low Not required Partial Partial Partial
In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, use of the ap_get_basic_auth_pw() by third-party modules outside of the authentication phase may lead to authentication requirements being bypassed.
35 CVE-2016-8612 20 2018-03-09 2019-10-09
3.3
None Local Network Low Not required None None Partial
Apache HTTP Server mod_cluster before version httpd 2.4.23 is vulnerable to an Improper Input Validation in the protocol parsing logic in the load balancer resulting in a Segmentation Fault in the serving httpd process.
36 CVE-2016-5387 284 2016-07-19 2021-06-06
5.1
None Remote High Not required Partial Partial Partial
The Apache HTTP Server through 2.4.23 follows RFC 3875 section 4.1.18 and therefore does not protect applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect an application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue. NOTE: the vendor states "This mitigation has been assigned the identifier CVE-2016-5387"; in other words, this is not a CVE ID for a vulnerability.
37 CVE-2015-3183 20 2015-07-20 2021-06-06
5.0
None Remote Low Not required None Partial None
The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c.
38 CVE-2015-0228 20 DoS 2015-03-08 2021-06-06
5.0
None Remote Low Not required None None Partial
The lua_websocket_read function in lua_request.c in the mod_lua module in the Apache HTTP Server through 2.4.12 allows remote attackers to cause a denial of service (child-process crash) by sending a crafted WebSocket Ping frame after a Lua script has called the wsupgrade function.
39 CVE-2014-0231 399 DoS 2014-07-20 2021-06-06
5.0
None Remote Low Not required None None Partial
The mod_cgid module in the Apache HTTP Server before 2.4.10 does not have a timeout mechanism, which allows remote attackers to cause a denial of service (process hang) via a request to a CGI script that does not read from its stdin file descriptor.
40 CVE-2014-0226 362 1 DoS Exec Code Overflow +Info 2014-07-20 2021-06-06
6.8
None Remote Medium Not required Partial Partial Partial
Race condition in the mod_status module in the Apache HTTP Server before 2.4.10 allows remote attackers to cause a denial of service (heap-based buffer overflow), or possibly obtain sensitive credential information or execute arbitrary code, via a crafted request that triggers improper scoreboard handling within the status_handler function in modules/generators/mod_status.c and the lua_ap_scoreboard_worker function in modules/lua/lua_request.c.
41 CVE-2014-0118 399 DoS 2014-07-20 2021-06-06
4.3
None Remote Medium Not required None None Partial
The deflate_in_filter function in mod_deflate.c in the mod_deflate module in the Apache HTTP Server before 2.4.10, when request body decompression is enabled, allows remote attackers to cause a denial of service (resource consumption) via crafted request data that decompresses to a much larger size.
42 CVE-2014-0098 20 DoS 2014-03-18 2021-06-06
5.0
None Remote Low Not required None None Partial
The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server before 2.4.8 allows remote attackers to cause a denial of service (segmentation fault and daemon crash) via a crafted cookie that is not properly handled during truncation.
43 CVE-2013-6438 20 DoS 2014-03-18 2021-06-06
5.0
None Remote Low Not required None None Partial
The dav_xml_get_cdata function in main/util.c in the mod_dav module in the Apache HTTP Server before 2.4.8 does not properly remove whitespace characters from CDATA sections, which allows remote attackers to cause a denial of service (daemon crash) via a crafted DAV WRITE request.
44 CVE-2013-2249 2013-07-23 2021-06-06
7.5
None Remote Low Not required Partial Partial Partial
mod_session_dbd.c in the mod_session_dbd module in the Apache HTTP Server before 2.4.5 proceeds with save operations for a session without considering the dirty flag and the requirement for a new session ID, which has unspecified impact and remote attack vectors.
45 CVE-2013-1896 264 DoS 2013-07-10 2021-06-06
4.3
None Remote Medium Not required None None Partial
mod_dav.c in the Apache HTTP Server before 2.2.25 does not properly determine whether DAV is enabled for a URI, which allows remote attackers to cause a denial of service (segmentation fault) via a MERGE request in which the URI is configured for handling by the mod_dav_svn module, but a certain href attribute in XML data refers to a non-DAV URI.
46 CVE-2012-0883 264 +Priv 2012-04-18 2021-06-06
6.9
None Local Medium Not required Complete Complete Complete
envvars (aka envvars-std) in the Apache HTTP Server before 2.4.2 places a zero-length directory name in the LD_LIBRARY_PATH, which allows local users to gain privileges via a Trojan horse DSO in the current working directory during execution of apachectl.
47 CVE-2012-0031 399 DoS 2012-01-18 2021-06-06
4.6
None Local Low Not required Partial Partial Partial
scoreboard.c in the Apache HTTP Server 2.2.21 and earlier might allow local users to cause a denial of service (daemon crash during shutdown) or possibly have unspecified other impact by modifying a certain type field within a scoreboard shared memory segment, leading to an invalid call to the free function.
48 CVE-2011-3348 399 DoS 2011-09-20 2021-06-06
4.3
None Remote Medium Not required None None Partial
The mod_proxy_ajp module in the Apache HTTP Server before 2.2.21, when used with mod_proxy_balancer in certain configurations, allows remote attackers to cause a denial of service (temporary "error state" in the backend server) via a malformed HTTP request.
49 CVE-2011-0419 399 DoS 2011-05-16 2021-06-06
4.3
None Remote Medium Not required None None Partial
Stack consumption vulnerability in the fnmatch implementation in apr_fnmatch.c in the Apache Portable Runtime (APR) library before 1.4.3 and the Apache HTTP Server before 2.2.18, and in fnmatch.c in libc in NetBSD 5.1, OpenBSD 4.8, FreeBSD, Apple Mac OS X 10.6, Oracle Solaris 10, and Android, allows context-dependent attackers to cause a denial of service (CPU and memory consumption) via *? sequences in the first argument, as demonstrated by attacks against mod_autoindex in httpd.
50 CVE-2010-0010 189 1 DoS Exec Code Overflow 2010-02-02 2021-06-06
6.8
None Remote Medium Not required Partial Partial Partial
Integer overflow in the ap_proxy_send_fb function in proxy/proxy_util.c in mod_proxy in the Apache HTTP Server before 1.3.42 on 64-bit platforms allows remote origin servers to cause a denial of service (daemon crash) or possibly execute arbitrary code via a large chunk size that triggers a heap-based buffer overflow.
Total number of vulnerabilities : 74   Page : 1 (This Page)2
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