Vulnerabilities (CVE)

Filtered by vendor Apache Subscribe
Filtered by product Http Server
Total 299 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2019-0196 3 Apache, Canonical, Debian 3 Http Server, Ubuntu Linux, Debian Linux 2023-11-07 5.0 MEDIUM 5.3 MEDIUM
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-2019-0190 3 Apache, Openssl, Oracle 6 Http Server, Openssl, Enterprise Manager Ops Center and 3 more 2023-11-07 5.0 MEDIUM 7.5 HIGH
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-2018-8011 2 Apache, Netapp 2 Http Server, Cloud Backup 2023-11-07 5.0 MEDIUM 7.5 HIGH
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-2018-1333 4 Apache, Canonical, Netapp and 1 more 6 Http Server, Ubuntu Linux, Cloud Backup and 3 more 2023-11-07 5.0 MEDIUM 7.5 HIGH
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-2018-1312 5 Apache, Canonical, Debian and 2 more 14 Http Server, Ubuntu Linux, Debian Linux and 11 more 2023-11-07 6.8 MEDIUM 9.8 CRITICAL
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-2018-1303 4 Apache, Canonical, Debian and 1 more 7 Http Server, Ubuntu Linux, Debian Linux and 4 more 2023-11-07 5.0 MEDIUM 7.5 HIGH
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-2018-1302 3 Apache, Canonical, Netapp 6 Http Server, Ubuntu Linux, Clustered Data Ontap and 3 more 2023-11-07 4.3 MEDIUM 5.9 MEDIUM
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-2018-1301 5 Apache, Canonical, Debian and 2 more 8 Http Server, Ubuntu Linux, Debian Linux and 5 more 2023-11-07 4.3 MEDIUM 5.9 MEDIUM
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-2018-1283 5 Apache, Canonical, Debian and 2 more 8 Http Server, Ubuntu Linux, Debian Linux and 5 more 2023-11-07 3.5 LOW 5.3 MEDIUM
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-2018-17199 5 Apache, Canonical, Debian and 2 more 6 Http Server, Ubuntu Linux, Debian Linux and 3 more 2023-11-07 5.0 MEDIUM 7.5 HIGH
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-2018-17189 7 Apache, Canonical, Debian and 4 more 13 Http Server, Ubuntu Linux, Debian Linux and 10 more 2023-11-07 5.0 MEDIUM 5.3 MEDIUM
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-2018-11763 5 Apache, Canonical, Netapp and 2 more 9 Http Server, Ubuntu Linux, Storage Automation Store and 6 more 2023-11-07 4.3 MEDIUM 5.9 MEDIUM
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-2017-9798 2 Apache, Debian 2 Http Server, Debian Linux 2023-11-07 5.0 MEDIUM 7.5 HIGH
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.
CVE-2017-9789 1 Apache 1 Http Server 2023-11-07 5.0 MEDIUM 7.5 HIGH
When under stress, closing many connections, the HTTP/2 handling code in Apache httpd 2.4.26 would sometimes access memory after it has been freed, resulting in potentially erratic behaviour.
CVE-2017-9788 6 Apache, Apple, Debian and 3 more 16 Http Server, Mac Os X, Debian Linux and 13 more 2023-11-07 6.4 MEDIUM 9.1 CRITICAL
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.
CVE-2017-7679 1 Apache 1 Http Server 2023-11-07 7.5 HIGH 9.8 CRITICAL
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.
CVE-2017-7668 6 Apache, Apple, Debian and 3 more 13 Http Server, Mac Os X, Debian Linux and 10 more 2023-11-07 5.0 MEDIUM 7.5 HIGH
The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.
CVE-2017-7659 1 Apache 1 Http Server 2023-11-07 5.0 MEDIUM 7.5 HIGH
A maliciously constructed HTTP/2 request could cause mod_http2 in Apache HTTP Server 2.4.24, 2.4.25 to dereference a NULL pointer and crash the server process.
CVE-2017-3169 1 Apache 1 Http Server 2023-11-07 7.5 HIGH 9.8 CRITICAL
In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, mod_ssl may dereference a NULL pointer when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port.
CVE-2017-3167 6 Apache, Apple, Debian and 3 more 15 Http Server, Mac Os X, Debian Linux and 12 more 2023-11-07 7.5 HIGH 9.8 CRITICAL
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.