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====================================================================                   
Red Hat Security Advisory

Synopsis:          Important: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP3 security update
Advisory ID:       RHSA-2020:2646-01
Product:           Red Hat JBoss Core Services
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:2646
Issue date:        2020-06-22
CVE Names:         CVE-2018-20843 CVE-2019-0196 CVE-2019-0197
                   CVE-2019-15903 CVE-2019-19956 CVE-2019-20388
                   CVE-2020-1934 CVE-2020-7595 CVE-2020-11080
====================================================================
1. Summary:

Red Hat JBoss Core Services Pack Apache Server 2.4.37 Service Pack 3 zip
release for RHEL 6, RHEL 7 and Microsoft Windows is available.

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.

2. Description:

Red Hat JBoss Core Services is a set of supplementary software for Red Hat
JBoss middleware products. This software, such as Apache HTTP Server, is
common to multiple JBoss middleware products, and is packaged under Red Hat
JBoss Core Services to allow for faster distribution of updates, and for a
more consistent update experience.

This release adds the new Apache HTTP Server 2.4.37 Service Pack 3 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 2.4.37 Service Pack 2 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.

Security fix(es):

* httpd: mod_http2: read-after-free on a string compare (CVE-2019-0196)
* httpd: mod_http2: possible crash on late upgrade (CVE-2019-0197)
* httpd: mod_proxy_ftp use of uninitialized value (CVE-2020-1934)
* nghttp2: overly large SETTINGS frames can lead to DoS (CVE-2020-11080)
* libxml2: There's a memory leak in xmlParseBalancedChunkMemoryRecover in
parser.c that could result in a crash (CVE-2019-19956)
* libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c (CVE-2019-20388)
* libxml2: infinite loop in xmlStringLenDecodeEntities in some end-of-file
situations (CVE-2020-7595)
* expat: large number of colons in input makes parser consume high amount
of resources, leading to DoS (CVE-2018-20843)
* expat: heap-based buffer over-read via crafted XML input (CVE-2019-15903)

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.

3. Solution:

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

The References section of this erratum contains a download link for the
update. You must be logged in to download the update.

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

1695030 - CVE-2019-0196 httpd: mod_http2: read-after-free on a string compare
1695042 - CVE-2019-0197 httpd: mod_http2: possible crash on late upgrade
1723723 - CVE-2018-20843 expat: large number of colons in input makes parser consume high amount of resources, leading to DoS
1752592 - CVE-2019-15903 expat: heap-based buffer over-read via crafted XML input
1788856 - CVE-2019-19956 libxml2: There's a memory leak in xmlParseBalancedChunkMemoryRecover in parser.c that could result in a crash
1799734 - CVE-2019-20388 libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c
1799786 - CVE-2020-7595 libxml2: infinite loop in xmlStringLenDecodeEntities in some end-of-file situations
1820772 - CVE-2020-1934 httpd: mod_proxy_ftp use of uninitialized value
1844929 - CVE-2020-11080 nghttp2: overly large SETTINGS frames can lead to DoS

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

JBCS-941 - Upgrade mod_cluster native to 1.3.13

6. References:

https://access.redhat.com/security/cve/CVE-2018-20843
https://access.redhat.com/security/cve/CVE-2019-0196
https://access.redhat.com/security/cve/CVE-2019-0197
https://access.redhat.com/security/cve/CVE-2019-15903
https://access.redhat.com/security/cve/CVE-2019-19956
https://access.redhat.com/security/cve/CVE-2019-20388
https://access.redhat.com/security/cve/CVE-2020-1934
https://access.redhat.com/security/cve/CVE-2020-7595
https://access.redhat.com/security/cve/CVE-2020-11080
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=core.service.apachehttp&downloadType=securityPatches&version=2.4.37
https://access.redhat.com/documentation/en-us/red_hat_jboss_core_services/2.4.37/

7. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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