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CVE-2019-0190

httpd: mod_ssl: infinite loop triggered by client-initiated renegotiation when using OpenSSL 1.1.1

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.

CVSS 3.1 · 7.5 High EPSS 59.9% KEV · Not listed
Vendors
Apache Openssl Oracle
Products
Http Server Openssl Enterprise Manager Ops Center and 3 more
CVE-2018-8011

mod_md, DoS via Coredumps on specially crafted requests

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).

CVSS 3.0 · 7.5 High EPSS 55.3% KEV · Not listed
Vendors
Apache Netapp
Products
Http Server Cloud Backup
CVE-2018-1333

DoS for HTTP/2 connections by crafted requests

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).

CVSS 3.0 · 7.5 High EPSS 17.0% KEV · Not listed
Vendors
Apache Canonical Netapp and 1 more
Products
Http Server Ubuntu Linux Cloud Backup and 4 more
CVE-2018-1312

httpd: Weak Digest auth nonce generation in mod_auth_digest

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.

CVSS 3.1 · 9.8 Critical EPSS 15.8% KEV · Not listed
Vendors
Apache Canonical Debian and 2 more
Products
Http Server Ubuntu Linux Debian Linux and 12 more
CVE-2018-1303

httpd: Out of bounds read in mod_cache_socache can allow a remote attacker to cause DoS

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.

CVSS 3.0 · 7.5 High EPSS 69.8% KEV · Not listed
Vendors
Apache Canonical Debian and 2 more
Products
Http Server Ubuntu Linux Debian Linux and 7 more
CVE-2018-1302

httpd: Use-after-free on HTTP/2 stream shutdown

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.

CVSS 3.0 · 5.9 Medium EPSS 12.9% KEV · Not listed
Vendors
Apache Canonical Netapp and 1 more
Products
Http Server Ubuntu Linux Clustered Data Ontap and 4 more
CVE-2018-1301

httpd: Out of bounds access after failure in reading the HTTP request

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.

CVSS 3.0 · 5.9 Medium EPSS 14.5% KEV · Not listed
Vendors
Apache Canonical Debian and 2 more
Products
Http Server Ubuntu Linux Debian Linux and 7 more
CVE-2018-1283

httpd: Improper handling of headers in mod_session can allow a remote user to modify session data for CGI applications

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.

CVSS 3.0 · 5.3 Medium EPSS 9.7% KEV · Not listed
Vendors
Apache Canonical Debian and 2 more
Products
Http Server Ubuntu Linux Debian Linux and 7 more
CVE-2018-17199

httpd: mod_session_cookie does not respect expiry time

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.

CVSS 3.0 · 7.5 High EPSS 20.0% KEV · Not listed
Vendors
Apache Canonical Debian and 3 more
Products
Http Server Ubuntu Linux Debian Linux and 6 more
CVE-2018-17189

httpd: mod_http2: DoS via slow, unneeded request bodies

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.

CVSS 3.1 · 5.3 Medium EPSS 19.4% KEV · Not listed
Vendors
Apache Canonical Debian and 4 more
Products
Http Server Ubuntu Linux Debian Linux and 11 more
CVE-2018-11763

httpd: DoS for HTTP/2 connections by continuous SETTINGS frames

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.

CVSS 3.0 · 5.9 Medium EPSS 51.0% KEV · Not listed
Vendors
Apache Canonical Netapp and 2 more
Products
Http Server Ubuntu Linux Storage Automation Store and 8 more
CVE-2017-15715

httpd: <FilesMatch> bypass with a trailing newline in the file name

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.

CVSS 3.0 · 8.1 High EPSS 86.2% KEV · Not listed
Vendors
Apache Canonical Debian and 2 more
Products
Http Server Ubuntu Linux Debian Linux and 7 more
CVE-2017-15710

httpd: Out of bounds write in mod_authnz_ldap when using too small Accept-Language values

In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and 2.4.0 to 2.4.29, mod_authnz_ldap, if configured with AuthLDAPCharsetConfig, uses the Accept-Language header value to lookup the right charset encoding when verifying the user's credentials. If the header value is not present in the charset conversion table, a fallback mechanism is used to truncate it to a two characters value to allow a quick retry (for example, 'en-US' is truncated to 'en'). A header value of less than two characters forces an out of bound write of one NUL byte to a memory location that is not part of the string. In the worst case, quite unlikely, the process would crash which could be used as a Denial of Service attack. In the more likely case, this memory is already reserved for future use and the issue has no effect at all.

CVSS 3.0 · 7.5 High EPSS 17.5% KEV · Not listed
Vendors
Apache Canonical Debian and 2 more
Products
Http Server Ubuntu Linux Debian Linux and 7 more
CVE-2017-12171

httpd: # character matches all IPs

A regression was found in the Red Hat Enterprise Linux 6.9 version of httpd 2.2.15-60, causing comments in the "Allow" and "Deny" configuration lines to be parsed incorrectly. A web administrator could unintentionally allow any client to access a restricted HTTP resource.

CVSS 3.0 · 6.5 Medium EPSS 8.1% KEV · Not listed
Vendors
Apache Redhat
Products
Http Server Enterprise Linux Enterprise Linux Desktop and 2 more
CVE-2016-8612

mod_cluster: Protocol parsing logic error

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.

CVSS 3.0 · 4.3 Medium EPSS 4.4% KEV · Not listed
Vendors
Apache Netapp Redhat
Products
Http Server Storage Automation Store Enterprise Linux and 1 more
CVE-2016-4975

mod_userdir CRLF injection

Possible CRLF injection allowing HTTP response splitting attacks for sites which use mod_userdir. This issue was mitigated by changes made in 2.4.25 and 2.2.32 which prohibit CR or LF injection into the "Location" or other outbound header key or value. Fixed in Apache HTTP Server 2.4.25 (Affected 2.4.1-2.4.23). Fixed in Apache HTTP Server 2.2.32 (Affected 2.2.0-2.2.31).

CVSS 3.0 · 6.1 Medium EPSS 19.9% KEV · Not listed
Vendors
Apache Redhat
Products
Http Server Enterprise Linux Jboss Core Services