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

Synopsis:          Important: httpd security update
Advisory ID:       RHSA-2021:3856-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:3856
Issue date:        2021-10-14
CVE Names:         CVE-2021-40438 
=====================================================================

1. Summary:

An update for httpd is now available for Red Hat Enterprise Linux 7, Red
Hat Enterprise Linux 7.2 Advanced Update Support, Red Hat Enterprise Linux
7.3 Advanced Update Support, Red Hat Enterprise Linux 7.4 Advanced Update
Support, Red Hat Enterprise Linux 7.6 Advanced Update Support, Red Hat
Enterprise Linux 7.6 Telco Extended Update Support, Red Hat Enterprise
Linux 7.6 Update Services for SAP Solutions, Red Hat Enterprise Linux 7.7
Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended Update
Support, and Red Hat Enterprise Linux 7.7 Update Services for SAP
Solutions.

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. Relevant releases/architectures:

Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server AUS (v. 7.2) - noarch, x86_64
Red Hat Enterprise Linux Server AUS (v. 7.3) - noarch, x86_64
Red Hat Enterprise Linux Server AUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server AUS (v. 7.6) - noarch, x86_64
Red Hat Enterprise Linux Server AUS (v. 7.7) - noarch, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.6) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.7) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.2) - x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.3) - x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.6) - x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.7) - x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.6) - ppc64le, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.6) - x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.7) - x86_64
Red Hat Enterprise Linux Server TUS (v. 7.6) - noarch, x86_64
Red Hat Enterprise Linux Server TUS (v. 7.7) - noarch, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

The httpd packages provide the Apache HTTP Server, a powerful, efficient,
and extensible web server.

Security Fix(es):

* httpd: mod_proxy: SSRF via a crafted request uri-path containing "unix:"
(CVE-2021-40438)

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.

4. 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

After installing the updated packages, the httpd daemon will be restarted
automatically.

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

2005117 - CVE-2021-40438 httpd: mod_proxy: SSRF via a crafted request uri-path containing "unix:"

6. Package List:

Red Hat Enterprise Linux Client Optional (v. 7):

Source:
httpd-2.4.6-97.el7_9.1.src.rpm

noarch:
httpd-manual-2.4.6-97.el7_9.1.noarch.rpm

x86_64:
httpd-2.4.6-97.el7_9.1.x86_64.rpm
httpd-debuginfo-2.4.6-97.el7_9.1.x86_64.rpm
httpd-devel-2.4.6-97.el7_9.1.x86_64.rpm
httpd-tools-2.4.6-97.el7_9.1.x86_64.rpm
mod_ldap-2.4.6-97.el7_9.1.x86_64.rpm
mod_proxy_html-2.4.6-97.el7_9.1.x86_64.rpm
mod_session-2.4.6-97.el7_9.1.x86_64.rpm
mod_ssl-2.4.6-97.el7_9.1.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

Source:
httpd-2.4.6-97.el7_9.1.src.rpm

noarch:
httpd-manual-2.4.6-97.el7_9.1.noarch.rpm

x86_64:
httpd-2.4.6-97.el7_9.1.x86_64.rpm
httpd-debuginfo-2.4.6-97.el7_9.1.x86_64.rpm
httpd-devel-2.4.6-97.el7_9.1.x86_64.rpm
httpd-tools-2.4.6-97.el7_9.1.x86_64.rpm
mod_ldap-2.4.6-97.el7_9.1.x86_64.rpm
mod_proxy_html-2.4.6-97.el7_9.1.x86_64.rpm
mod_session-2.4.6-97.el7_9.1.x86_64.rpm
mod_ssl-2.4.6-97.el7_9.1.x86_64.rpm

Red Hat Enterprise Linux Server AUS (v. 7.2):

Source:
httpd-2.4.6-40.el7_2.7.src.rpm

noarch:
httpd-manual-2.4.6-40.el7_2.7.noarch.rpm

x86_64:
httpd-2.4.6-40.el7_2.7.x86_64.rpm
httpd-debuginfo-2.4.6-40.el7_2.7.x86_64.rpm
httpd-devel-2.4.6-40.el7_2.7.x86_64.rpm
httpd-tools-2.4.6-40.el7_2.7.x86_64.rpm
mod_ssl-2.4.6-40.el7_2.7.x86_64.rpm

Red Hat Enterprise Linux Server AUS (v. 7.3):

Source:
httpd-2.4.6-45.el7_3.6.src.rpm

noarch:
httpd-manual-2.4.6-45.el7_3.6.noarch.rpm

x86_64:
httpd-2.4.6-45.el7_3.6.x86_64.rpm
httpd-debuginfo-2.4.6-45.el7_3.6.x86_64.rpm
httpd-devel-2.4.6-45.el7_3.6.x86_64.rpm
httpd-tools-2.4.6-45.el7_3.6.x86_64.rpm
mod_ssl-2.4.6-45.el7_3.6.x86_64.rpm

Red Hat Enterprise Linux Server AUS (v. 7.4):

Source:
httpd-2.4.6-67.el7_4.7.src.rpm

noarch:
httpd-manual-2.4.6-67.el7_4.7.noarch.rpm

x86_64:
httpd-2.4.6-67.el7_4.7.x86_64.rpm
httpd-debuginfo-2.4.6-67.el7_4.7.x86_64.rpm
httpd-devel-2.4.6-67.el7_4.7.x86_64.rpm
httpd-tools-2.4.6-67.el7_4.7.x86_64.rpm
mod_session-2.4.6-67.el7_4.7.x86_64.rpm
mod_ssl-2.4.6-67.el7_4.7.x86_64.rpm

Red Hat Enterprise Linux Server AUS (v. 7.6):

Source:
httpd-2.4.6-89.el7_6.2.src.rpm

noarch:
httpd-manual-2.4.6-89.el7_6.2.noarch.rpm

x86_64:
httpd-2.4.6-89.el7_6.2.x86_64.rpm
httpd-debuginfo-2.4.6-89.el7_6.2.x86_64.rpm
httpd-devel-2.4.6-89.el7_6.2.x86_64.rpm
httpd-tools-2.4.6-89.el7_6.2.x86_64.rpm
mod_session-2.4.6-89.el7_6.2.x86_64.rpm
mod_ssl-2.4.6-89.el7_6.2.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.6):

Source:
httpd-2.4.6-89.el7_6.2.src.rpm

noarch:
httpd-manual-2.4.6-89.el7_6.2.noarch.rpm

ppc64le:
httpd-2.4.6-89.el7_6.2.ppc64le.rpm
httpd-debuginfo-2.4.6-89.el7_6.2.ppc64le.rpm
httpd-devel-2.4.6-89.el7_6.2.ppc64le.rpm
httpd-tools-2.4.6-89.el7_6.2.ppc64le.rpm
mod_session-2.4.6-89.el7_6.2.ppc64le.rpm
mod_ssl-2.4.6-89.el7_6.2.ppc64le.rpm

x86_64:
httpd-2.4.6-89.el7_6.2.x86_64.rpm
httpd-debuginfo-2.4.6-89.el7_6.2.x86_64.rpm
httpd-devel-2.4.6-89.el7_6.2.x86_64.rpm
httpd-tools-2.4.6-89.el7_6.2.x86_64.rpm
mod_session-2.4.6-89.el7_6.2.x86_64.rpm
mod_ssl-2.4.6-89.el7_6.2.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 7.6):

Source:
httpd-2.4.6-89.el7_6.2.src.rpm

noarch:
httpd-manual-2.4.6-89.el7_6.2.noarch.rpm

x86_64:
httpd-2.4.6-89.el7_6.2.x86_64.rpm
httpd-debuginfo-2.4.6-89.el7_6.2.x86_64.rpm
httpd-devel-2.4.6-89.el7_6.2.x86_64.rpm
httpd-tools-2.4.6-89.el7_6.2.x86_64.rpm
mod_session-2.4.6-89.el7_6.2.x86_64.rpm
mod_ssl-2.4.6-89.el7_6.2.x86_64.rpm

Red Hat Enterprise Linux Server AUS (v. 7.7):

Source:
httpd-2.4.6-90.el7_7.1.src.rpm

noarch:
httpd-manual-2.4.6-90.el7_7.1.noarch.rpm

x86_64:
httpd-2.4.6-90.el7_7.1.x86_64.rpm
httpd-debuginfo-2.4.6-90.el7_7.1.x86_64.rpm
httpd-devel-2.4.6-90.el7_7.1.x86_64.rpm
httpd-tools-2.4.6-90.el7_7.1.x86_64.rpm
mod_session-2.4.6-90.el7_7.1.x86_64.rpm
mod_ssl-2.4.6-90.el7_7.1.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.7):

Source:
httpd-2.4.6-90.el7_7.1.src.rpm

noarch:
httpd-manual-2.4.6-90.el7_7.1.noarch.rpm

ppc64le:
httpd-2.4.6-90.el7_7.1.ppc64le.rpm
httpd-debuginfo-2.4.6-90.el7_7.1.ppc64le.rpm
httpd-devel-2.4.6-90.el7_7.1.ppc64le.rpm
httpd-tools-2.4.6-90.el7_7.1.ppc64le.rpm
mod_session-2.4.6-90.el7_7.1.ppc64le.rpm
mod_ssl-2.4.6-90.el7_7.1.ppc64le.rpm

x86_64:
httpd-2.4.6-90.el7_7.1.x86_64.rpm
httpd-debuginfo-2.4.6-90.el7_7.1.x86_64.rpm
httpd-devel-2.4.6-90.el7_7.1.x86_64.rpm
httpd-tools-2.4.6-90.el7_7.1.x86_64.rpm
mod_session-2.4.6-90.el7_7.1.x86_64.rpm
mod_ssl-2.4.6-90.el7_7.1.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 7.7):

Source:
httpd-2.4.6-90.el7_7.1.src.rpm

noarch:
httpd-manual-2.4.6-90.el7_7.1.noarch.rpm

x86_64:
httpd-2.4.6-90.el7_7.1.x86_64.rpm
httpd-debuginfo-2.4.6-90.el7_7.1.x86_64.rpm
httpd-devel-2.4.6-90.el7_7.1.x86_64.rpm
httpd-tools-2.4.6-90.el7_7.1.x86_64.rpm
mod_session-2.4.6-90.el7_7.1.x86_64.rpm
mod_ssl-2.4.6-90.el7_7.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
httpd-2.4.6-97.el7_9.1.src.rpm

noarch:
httpd-manual-2.4.6-97.el7_9.1.noarch.rpm

ppc64:
httpd-2.4.6-97.el7_9.1.ppc64.rpm
httpd-debuginfo-2.4.6-97.el7_9.1.ppc64.rpm
httpd-devel-2.4.6-97.el7_9.1.ppc64.rpm
httpd-tools-2.4.6-97.el7_9.1.ppc64.rpm
mod_session-2.4.6-97.el7_9.1.ppc64.rpm
mod_ssl-2.4.6-97.el7_9.1.ppc64.rpm

ppc64le:
httpd-2.4.6-97.el7_9.1.ppc64le.rpm
httpd-debuginfo-2.4.6-97.el7_9.1.ppc64le.rpm
httpd-devel-2.4.6-97.el7_9.1.ppc64le.rpm
httpd-tools-2.4.6-97.el7_9.1.ppc64le.rpm
mod_session-2.4.6-97.el7_9.1.ppc64le.rpm
mod_ssl-2.4.6-97.el7_9.1.ppc64le.rpm

s390x:
httpd-2.4.6-97.el7_9.1.s390x.rpm
httpd-debuginfo-2.4.6-97.el7_9.1.s390x.rpm
httpd-devel-2.4.6-97.el7_9.1.s390x.rpm
httpd-tools-2.4.6-97.el7_9.1.s390x.rpm
mod_session-2.4.6-97.el7_9.1.s390x.rpm
mod_ssl-2.4.6-97.el7_9.1.s390x.rpm

x86_64:
httpd-2.4.6-97.el7_9.1.x86_64.rpm
httpd-debuginfo-2.4.6-97.el7_9.1.x86_64.rpm
httpd-devel-2.4.6-97.el7_9.1.x86_64.rpm
httpd-tools-2.4.6-97.el7_9.1.x86_64.rpm
mod_session-2.4.6-97.el7_9.1.x86_64.rpm
mod_ssl-2.4.6-97.el7_9.1.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.2):

x86_64:
httpd-debuginfo-2.4.6-40.el7_2.7.x86_64.rpm
mod_ldap-2.4.6-40.el7_2.7.x86_64.rpm
mod_proxy_html-2.4.6-40.el7_2.7.x86_64.rpm
mod_session-2.4.6-40.el7_2.7.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.3):

x86_64:
httpd-debuginfo-2.4.6-45.el7_3.6.x86_64.rpm
mod_ldap-2.4.6-45.el7_3.6.x86_64.rpm
mod_proxy_html-2.4.6-45.el7_3.6.x86_64.rpm
mod_session-2.4.6-45.el7_3.6.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.4):

x86_64:
httpd-debuginfo-2.4.6-67.el7_4.7.x86_64.rpm
mod_ldap-2.4.6-67.el7_4.7.x86_64.rpm
mod_proxy_html-2.4.6-67.el7_4.7.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.6):

x86_64:
httpd-debuginfo-2.4.6-89.el7_6.2.x86_64.rpm
mod_ldap-2.4.6-89.el7_6.2.x86_64.rpm
mod_proxy_html-2.4.6-89.el7_6.2.x86_64.rpm

Red Hat Enterprise Linux Server Optional E4S (v. 7.6):

ppc64le:
httpd-debuginfo-2.4.6-89.el7_6.2.ppc64le.rpm
mod_ldap-2.4.6-89.el7_6.2.ppc64le.rpm
mod_proxy_html-2.4.6-89.el7_6.2.ppc64le.rpm

x86_64:
httpd-debuginfo-2.4.6-89.el7_6.2.x86_64.rpm
mod_ldap-2.4.6-89.el7_6.2.x86_64.rpm
mod_proxy_html-2.4.6-89.el7_6.2.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 7.6):

x86_64:
httpd-debuginfo-2.4.6-89.el7_6.2.x86_64.rpm
mod_ldap-2.4.6-89.el7_6.2.x86_64.rpm
mod_proxy_html-2.4.6-89.el7_6.2.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.7):

x86_64:
httpd-debuginfo-2.4.6-90.el7_7.1.x86_64.rpm
mod_ldap-2.4.6-90.el7_7.1.x86_64.rpm
mod_proxy_html-2.4.6-90.el7_7.1.x86_64.rpm

Red Hat Enterprise Linux Server Optional E4S (v. 7.6):

ppc64le:
httpd-debuginfo-2.4.6-90.el7_7.1.ppc64le.rpm
mod_ldap-2.4.6-90.el7_7.1.ppc64le.rpm
mod_proxy_html-2.4.6-90.el7_7.1.ppc64le.rpm

x86_64:
httpd-debuginfo-2.4.6-90.el7_7.1.x86_64.rpm
mod_ldap-2.4.6-90.el7_7.1.x86_64.rpm
mod_proxy_html-2.4.6-90.el7_7.1.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 7.7):

x86_64:
httpd-debuginfo-2.4.6-90.el7_7.1.x86_64.rpm
mod_ldap-2.4.6-90.el7_7.1.x86_64.rpm
mod_proxy_html-2.4.6-90.el7_7.1.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64:
httpd-debuginfo-2.4.6-97.el7_9.1.ppc64.rpm
mod_ldap-2.4.6-97.el7_9.1.ppc64.rpm
mod_proxy_html-2.4.6-97.el7_9.1.ppc64.rpm

ppc64le:
httpd-debuginfo-2.4.6-97.el7_9.1.ppc64le.rpm
mod_ldap-2.4.6-97.el7_9.1.ppc64le.rpm
mod_proxy_html-2.4.6-97.el7_9.1.ppc64le.rpm

s390x:
httpd-debuginfo-2.4.6-97.el7_9.1.s390x.rpm
mod_ldap-2.4.6-97.el7_9.1.s390x.rpm
mod_proxy_html-2.4.6-97.el7_9.1.s390x.rpm

x86_64:
httpd-debuginfo-2.4.6-97.el7_9.1.x86_64.rpm
mod_ldap-2.4.6-97.el7_9.1.x86_64.rpm
mod_proxy_html-2.4.6-97.el7_9.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
httpd-2.4.6-97.el7_9.1.src.rpm

noarch:
httpd-manual-2.4.6-97.el7_9.1.noarch.rpm

x86_64:
httpd-2.4.6-97.el7_9.1.x86_64.rpm
httpd-debuginfo-2.4.6-97.el7_9.1.x86_64.rpm
httpd-devel-2.4.6-97.el7_9.1.x86_64.rpm
httpd-tools-2.4.6-97.el7_9.1.x86_64.rpm
mod_session-2.4.6-97.el7_9.1.x86_64.rpm
mod_ssl-2.4.6-97.el7_9.1.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
httpd-debuginfo-2.4.6-97.el7_9.1.x86_64.rpm
mod_ldap-2.4.6-97.el7_9.1.x86_64.rpm
mod_proxy_html-2.4.6-97.el7_9.1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2021-40438
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2021 Red Hat, Inc.
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