Apache HTTP Server

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

CVE-2020-11993 7.5 - High - August 07, 2020

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.

CVE-2020-11993 can be explotited with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Apache HTTP Server versions 2.4.20 to 2.4.43

CVE-2020-9490 7.5 - High - August 07, 2020

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.

CVE-2020-9490 is exploitable with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Apache HTTP server 2.4.32 to 2.4.44 mod_proxy_uwsgi info disclosure and possible RCE

CVE-2020-11984 9.8 - Critical - August 07, 2020

Apache HTTP server 2.4.32 to 2.4.44 mod_proxy_uwsgi info disclosure and possible RCE

CVE-2020-11984 is exploitable with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to be critical as this vulneraility has a high impact to the confidentiality, integrity and availability of this component.

buffer overrun

IP address spoofing when proxying using mod_remoteip and mod_rewrite For configurations using proxying with mod_remoteip and certain mod_rewrite rules

CVE-2020-11985 5.3 - Medium - August 07, 2020

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.

CVE-2020-11985 can be explotited with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and no impact on availability.

Insufficient Verification of Data Authenticity

In Apache HTTP Server 2.4.0 to 2.4.41, redirects configured with mod_rewrite

CVE-2020-1927 6.1 - Medium - April 02, 2020

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.

CVE-2020-1927 can be explotited with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 2.8 out of four. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.

Open Redirect

In Apache HTTP Server 2.4.0 to 2.4.41

CVE-2020-1934 5.3 - Medium - April 01, 2020

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.

CVE-2020-1934 is exploitable with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.

Use of Uninitialized Resource

Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: Web Listener)

CVE-2020-2530 6.1 - Medium - January 15, 2020

Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: Web Listener). Supported versions that are affected are 11.1.1.9.0, 12.1.3.0.0 and 12.2.1.3.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle HTTP Server. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle HTTP Server, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle HTTP Server accessible data as well as unauthorized read access to a subset of Oracle HTTP Server accessible data. CVSS 3.0 Base Score 6.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

CVE-2020-2530 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 2.8 out of four. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.

In Apache HTTP Server 2.4.18-2.4.39

CVE-2019-10082 9.1 - Critical - September 26, 2019

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.

CVE-2019-10082 is exploitable with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity, and a high impact on availability.

Dangling pointer

In Apache HTTP Server 2.4.0-2.4.39, a limited cross-site scripting issue was reported affecting the mod_proxy error page

CVE-2019-10092 6.1 - Medium - September 26, 2019

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.

CVE-2019-10092 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 2.8 out of four. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.

XSS

In Apache HTTP Server 2.4.32-2.4.39

CVE-2019-10097 7.2 - High - September 26, 2019

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.

CVE-2019-10097 can be explotited with network access, and requires user privledges. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 1.2 out of four. The potential impact of an exploit of this vulnerability is considered to be very high.

Out-of-bounds Write

In Apache HTTP server 2.4.0 to 2.4.39, Redirects configured with mod_rewrite

CVE-2019-10098 6.1 - Medium - September 25, 2019

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.

CVE-2019-10098 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 2.8 out of four. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.

Open Redirect

HTTP/2 (2.4.20 through 2.4.39) very early pushes

CVE-2019-10081 7.5 - High - August 15, 2019

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.

CVE-2019-10081 can be explotited with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Out-of-bounds Write

A vulnerability was found in Apache HTTP Server 2.4.17 to 2.4.38

CVE-2019-0196 5.3 - Medium - June 11, 2019

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.

CVE-2019-0196 is exploitable with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a small impact on availability.

Dangling pointer

A vulnerability was found in Apache HTTP Server 2.4.34 to 2.4.38

CVE-2019-0197 4.2 - Medium - June 11, 2019

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.

CVE-2019-0197 can be explotited with network access, and requires small amount of user privledges. This vulnerability is consided to have a high level of attack complexity. It has an exploitability score of 1.6 out of four. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity and availability.

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

A vulnerability was found in Apache HTTP Server 2.4.0 to 2.4.38

CVE-2019-0220 5.3 - Medium - June 11, 2019

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.

CVE-2019-0220 is exploitable with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.

Use of Incorrectly-Resolved Name or Reference

In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38

CVE-2019-0211 7.8 - High - April 08, 2019

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.

CVE-2019-0211 can be explotited with local system access, and requires small amount of user privledges. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 1.8 out of four. The potential impact of an exploit of this vulnerability is considered to be very high.

Dangling pointer

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

CVE-2019-0217 7.5 - High - April 08, 2019

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.

CVE-2019-0217 can be explotited with network access, and requires small amount of user privledges. This vulnerability is consided to have a high level of attack complexity. It has an exploitability score of 1.6 out of four. The potential impact of an exploit of this vulnerability is considered to be very high.

Race Condition

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

CVE-2019-0215 7.5 - High - April 08, 2019

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.

CVE-2019-0215 can be explotited with network access, and requires small amount of user privledges. This vulnerability is consided to have a high level of attack complexity. It has an exploitability score of 1.6 out of four. The potential impact of an exploit of this vulnerability is considered to be very high.

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

CVE-2018-17189 5.3 - Medium - January 30, 2019

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.

CVE-2018-17189 can be explotited with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a small impact on availability.

Uncontrolled Resource Consumption ('Resource Exhaustion')

In Apache HTTP Server 2.4 release 2.4.37 and prior, mod_session checks the session expiry time before decoding the session

CVE-2018-17199 7.5 - High - January 30, 2019

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.

CVE-2018-17199 can be explotited with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, a high impact on integrity, and no impact on availability.

384

A bug exists in the way mod_ssl handled client renegotiations

CVE-2019-0190 7.5 - High - January 30, 2019

A bug exists in the way mod_ssl handled client renegotiations. A remote attacker could send a carefully crafted request that would cause mod_ssl to enter a loop leading to a denial of service. This bug can be only triggered with Apache HTTP Server version 2.4.37 when using OpenSSL version 1.1.1 or later, due to an interaction in changes to handling of renegotiation attempts.

CVE-2019-0190 is exploitable with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client

CVE-2018-11763 5.9 - Medium - September 25, 2018

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.

CVE-2018-11763 can be explotited with network access, and does not require authorization privledges or user interaction. This vulnerability is consided to have a high level of attack complexity. It has an exploitability score of 2.2 out of four. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

By specially crafting HTTP requests, the mod_md challenge handler would dereference a NULL pointer and cause the child process to segfault

CVE-2018-8011 7.5 - High - July 18, 2018

By specially crafting HTTP requests, the mod_md challenge handler would dereference a NULL pointer and cause the child process to segfault. This could be used to DoS the server. Fixed in Apache HTTP Server 2.4.34 (Affected 2.4.33).

CVE-2018-8011 can be explotited with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

NULL Pointer Dereference

By specially crafting HTTP/2 requests, workers

CVE-2018-1333 7.5 - High - June 18, 2018

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).

CVE-2018-1333 can be explotited with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Uncontrolled Resource Consumption ('Resource Exhaustion')

A specially crafted request could have crashed the Apache HTTP Server prior to version 2.4.30

CVE-2018-1301 5.9 - Medium - March 26, 2018

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.

CVE-2018-1301 can be explotited with network access, and does not require authorization privledges or user interaction. This vulnerability is consided to have a high level of attack complexity. It has an exploitability score of 2.2 out of four. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Memory Corruption

When an HTTP/2 stream was destroyed after being handled

CVE-2018-1302 5.9 - Medium - March 26, 2018

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.

CVE-2018-1302 is exploitable with network access, and does not require authorization privledges or user interaction. This vulnerability is consided to have a high level of attack complexity. It has an exploitability score of 2.2 out of four. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

NULL Pointer Dereference

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

CVE-2018-1303 7.5 - High - March 26, 2018

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.

CVE-2018-1303 can be explotited with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Out-of-bounds Read

In Apache httpd 2.2.0 to 2.4.29

CVE-2018-1312 9.8 - Critical - March 26, 2018

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.

CVE-2018-1312 is exploitable with network access, and does not require authorization privledges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to be critical as this vulneraility has a high impact to the confidentiality, integrity and availability of this component.

authentification

In Apache httpd 2.4.0 to 2.4.29

CVE-2018-1283 5.3 - Medium - March 26, 2018

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.

CVE-2018-1283 can be explotited with network access, and requires small amount of user privledges. This vulnerability is consided to have a high level of attack complexity. It has an exploitability score of 1.6 out of four. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, a high impact on integrity, and no impact on availability.

Multiple buffer overflows in smbvalid/smbval SMB authentication library, as used in Apache::AuthenSmb and possibly other modules

CVE-1999-1237 - June 06, 1999

Multiple buffer overflows in smbvalid/smbval SMB authentication library, as used in Apache::AuthenSmb and possibly other modules, allows remote attackers to execute arbitrary commands via (1) a long username, (2) a long password, and (3) other unspecified methods.

buffer overrun

test-cgi program allows an attacker to list files on the server.

CVE-1999-0070 - April 01, 1996

test-cgi program allows an attacker to list files on the server.