Vulnerability-Lookup

VAR-201908-0266

Vulnerability from variot - Updated: 2026-04-10 21:58

Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory. Multiple HTTP/2 implementations are vulnerable to a variety of denial-of-service (DoS) attacks. HTTP/2 is the second version of the hypertext transfer protocol, which is mainly used to ensure the communication between the client and the server. A resource management error vulnerability exists in HTTP/2. A vulnerability in the HTTP/2 implementation of Nginx could allow an unauthenticated, remote malicious user to cause a denial of service (DoS) condition on a targeted system. The vulnerability is due to improper parsing of zero length headers by the affected software that could lead to excessive CPU usage. An attacker could exploit this vulnerability by sending a request that submits malicious input to an affected system. A successful exploit could result in a DoS condition on the targeted system. nginx.org has confirmed the vulnerability and released software updates. Solution:

Before applying this update, make sure all previously released errata relevant to your system have been applied.

Bug Fix(es):

Fixed repository mirror credentials properly escaped to allow special characters
Fixed repository mirror UI cancel button enabled
Fixed repository mirror UI change next sync date
Solution:

Please download the release images via:

quay.io/redhat/quay:v3.1.1 quay.io/redhat/clair-jwt:v3.1.1 quay.io/redhat/quay-builder:v3.1.1

JIRA issues fixed (https://issues.jboss.org/):

JBCS-828 - Rebase nghttp2 to 1.39.2

The purpose of this text-only errata is to inform you about the security issues fixed in this release. Solution:

Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.

Installation instructions are available from the Fuse 7.6.0 product documentation page: https://access.redhat.com/documentation/en-us/red_hat_fuse/7.6/

Bugs fixed (https://bugzilla.redhat.com/):

1399546 - CVE-2015-9251 js-jquery: Cross-site scripting via cross-domain ajax requests 1432858 - CVE-2017-5929 logback: Serialization vulnerability in SocketServer and ServerSocketReceiver 1591854 - CVE-2017-16012 js-jquery: XSS in responses from cross-origin ajax requests 1618573 - CVE-2018-11771 apache-commons-compress: ZipArchiveInputStream.read() fails to identify correct EOF allowing for DoS via crafted zip 1643043 - CVE-2018-15756 springframework: DoS Attack via Range Requests 1693777 - CVE-2019-3888 undertow: leak credentials to log files UndertowLogger.REQUEST_LOGGER.undertowRequestFailed 1703469 - CVE-2019-10174 infinispan: invokeAccessibly method from ReflectionUtil class allows to invoke private methods 1709860 - CVE-2019-5427 c3p0: loading XML configuration leads to denial of service 1713068 - CVE-2019-10184 undertow: Information leak in requests for directories without trailing slashes 1725795 - CVE-2019-12814 jackson-databind: polymorphic typing issue allows attacker to read arbitrary local files on the server via crafted JSON message. Description:

This release adds the new Apache HTTP Server 2.4.37 packages that are part of the JBoss Core Services offering.

This release serves as a replacement for Red Hat JBoss Core Services Pack Apache Server 2.4.29 and includes bug fixes and enhancements. Refer to the Release Notes for information on the most significant bug fixes and enhancements included in this release. After installing the updated packages, the httpd daemon will be restarted automatically. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256

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Red Hat Security Advisory

Synopsis: Important: rh-nginx112-nginx security update Advisory ID: RHSA-2019:2746-01 Product: Red Hat Software Collections Advisory URL: https://access.redhat.com/errata/RHSA-2019:2746 Issue date: 2019-09-12 CVE Names: CVE-2019-9511 CVE-2019-9513 CVE-2019-9516 ==================================================================== 1. Summary:

An update for rh-nginx112-nginx is now available for Red Hat Software Collections.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Relevant releases/architectures:

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64le, s390x, x86_64 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) - ppc64le, s390x, x86_64 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) - ppc64le, s390x, x86_64 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) - ppc64le, s390x, x86_64 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) - ppc64le, s390x, x86_64 Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Description:

nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage.

Security Fix(es):

HTTP/2: large amount of data request leads to denial of service (CVE-2019-9511)
HTTP/2: flood using PRIORITY frames resulting in excessive resource consumption (CVE-2019-9513)
HTTP/2: 0-length headers leads to denial of service (CVE-2019-9516)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution:

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The rh-nginx112-nginx service must be restarted for this update to take effect.

Bugs fixed (https://bugzilla.redhat.com/):

1735741 - CVE-2019-9513 HTTP/2: flood using PRIORITY frames resulting in excessive resource consumption 1741860 - CVE-2019-9511 HTTP/2: large amount of data request leads to denial of service 1741864 - CVE-2019-9516 HTTP/2: 0-length headers leads to denial of service

Package List:

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7):