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Red Hat Security Advisory 2017-3193-01

Red Hat Security Advisory 2017-3193-01
Posted Nov 13, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-3193-01 - The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. Security Fix: It was discovered that the httpd's mod_auth_digest module did not properly initialize memory before using it when processing certain headers related to digest authentication. A remote attacker could possibly use this flaw to disclose potentially sensitive information or cause httpd child process to crash by sending specially crafted requests to a server.

tags | advisory, remote, web
systems | linux, redhat
advisories | CVE-2017-3167, CVE-2017-3169, CVE-2017-7668, CVE-2017-7679, CVE-2017-9788, CVE-2017-9798
MD5 | 9c32244644eb4897ec1ed63b28ad3243

Red Hat Security Advisory 2017-3193-01

Change Mirror Download
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=====================================================================
Red Hat Security Advisory

Synopsis: Important: httpd security update
Advisory ID: RHSA-2017:3193-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:3193
Issue date: 2017-11-13
CVE Names: CVE-2017-3167 CVE-2017-3169 CVE-2017-7668
CVE-2017-7679 CVE-2017-9788 CVE-2017-9798
=====================================================================

1. Summary:

An update for httpd is now available for Red Hat Enterprise Linux 7.2
Extended Update Support.

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 ComputeNode Optional EUS (v. 7.2) - noarch, x86_64
Red Hat Enterprise Linux Server EUS (v. 7.2) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.2) - ppc64, ppc64le, s390x, x86_64

3. Description:

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

Security Fix(es):

* It was discovered that the httpd's mod_auth_digest module did not
properly initialize memory before using it when processing certain headers
related to digest authentication. A remote attacker could possibly use this
flaw to disclose potentially sensitive information or cause httpd child
process to crash by sending specially crafted requests to a server.
(CVE-2017-9788)

* It was discovered that the use of httpd's ap_get_basic_auth_pw() API
function outside of the authentication phase could lead to authentication
bypass. A remote attacker could possibly use this flaw to bypass required
authentication if the API was used incorrectly by one of the modules used
by httpd. (CVE-2017-3167)

* A NULL pointer dereference flaw was found in the httpd's mod_ssl module.
A remote attacker could use this flaw to cause an httpd child process to
crash if another module used by httpd called a certain API function during
the processing of an HTTPS request. (CVE-2017-3169)

* A buffer over-read flaw was found in the httpd's ap_find_token()
function. A remote attacker could use this flaw to cause httpd child
process to crash via a specially crafted HTTP request. (CVE-2017-7668)

* A buffer over-read flaw was found in the httpd's mod_mime module. A user
permitted to modify httpd's MIME configuration could use this flaw to cause
httpd child process to crash. (CVE-2017-7679)

* A use-after-free flaw was found in the way httpd handled invalid and
previously unregistered HTTP methods specified in the Limit directive used
in an .htaccess file. A remote attacker could possibly use this flaw to
disclose portions of the server memory, or cause httpd child process to
crash. (CVE-2017-9798)

Red Hat would like to thank Hanno BAPck for reporting CVE-2017-9798.

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/):

1463194 - CVE-2017-3167 httpd: ap_get_basic_auth_pw() authentication bypass
1463197 - CVE-2017-3169 httpd: mod_ssl NULL pointer dereference
1463205 - CVE-2017-7668 httpd: ap_find_token() buffer overread
1463207 - CVE-2017-7679 httpd: mod_mime buffer overread
1470748 - CVE-2017-9788 httpd: Uninitialized memory reflection in mod_auth_digest
1490344 - CVE-2017-9798 httpd: Use-after-free by limiting unregistered HTTP method (Optionsbleed)

6. Package List:

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.2):

Source:
httpd-2.4.6-40.el7_2.6.src.rpm

noarch:
httpd-manual-2.4.6-40.el7_2.6.noarch.rpm

x86_64:
httpd-2.4.6-40.el7_2.6.x86_64.rpm
httpd-debuginfo-2.4.6-40.el7_2.6.x86_64.rpm
httpd-devel-2.4.6-40.el7_2.6.x86_64.rpm
httpd-tools-2.4.6-40.el7_2.6.x86_64.rpm
mod_ldap-2.4.6-40.el7_2.6.x86_64.rpm
mod_proxy_html-2.4.6-40.el7_2.6.x86_64.rpm
mod_session-2.4.6-40.el7_2.6.x86_64.rpm
mod_ssl-2.4.6-40.el7_2.6.x86_64.rpm

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

Source:
httpd-2.4.6-40.el7_2.6.src.rpm

noarch:
httpd-manual-2.4.6-40.el7_2.6.noarch.rpm

ppc64:
httpd-2.4.6-40.el7_2.6.ppc64.rpm
httpd-debuginfo-2.4.6-40.el7_2.6.ppc64.rpm
httpd-devel-2.4.6-40.el7_2.6.ppc64.rpm
httpd-tools-2.4.6-40.el7_2.6.ppc64.rpm
mod_ssl-2.4.6-40.el7_2.6.ppc64.rpm

ppc64le:
httpd-2.4.6-40.el7_2.6.ppc64le.rpm
httpd-debuginfo-2.4.6-40.el7_2.6.ppc64le.rpm
httpd-devel-2.4.6-40.el7_2.6.ppc64le.rpm
httpd-tools-2.4.6-40.el7_2.6.ppc64le.rpm
mod_ssl-2.4.6-40.el7_2.6.ppc64le.rpm

s390x:
httpd-2.4.6-40.el7_2.6.s390x.rpm
httpd-debuginfo-2.4.6-40.el7_2.6.s390x.rpm
httpd-devel-2.4.6-40.el7_2.6.s390x.rpm
httpd-tools-2.4.6-40.el7_2.6.s390x.rpm
mod_ssl-2.4.6-40.el7_2.6.s390x.rpm

x86_64:
httpd-2.4.6-40.el7_2.6.x86_64.rpm
httpd-debuginfo-2.4.6-40.el7_2.6.x86_64.rpm
httpd-devel-2.4.6-40.el7_2.6.x86_64.rpm
httpd-tools-2.4.6-40.el7_2.6.x86_64.rpm
mod_ssl-2.4.6-40.el7_2.6.x86_64.rpm

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

ppc64:
httpd-debuginfo-2.4.6-40.el7_2.6.ppc64.rpm
mod_ldap-2.4.6-40.el7_2.6.ppc64.rpm
mod_proxy_html-2.4.6-40.el7_2.6.ppc64.rpm
mod_session-2.4.6-40.el7_2.6.ppc64.rpm

ppc64le:
httpd-debuginfo-2.4.6-40.el7_2.6.ppc64le.rpm
mod_ldap-2.4.6-40.el7_2.6.ppc64le.rpm
mod_proxy_html-2.4.6-40.el7_2.6.ppc64le.rpm
mod_session-2.4.6-40.el7_2.6.ppc64le.rpm

s390x:
httpd-debuginfo-2.4.6-40.el7_2.6.s390x.rpm
mod_ldap-2.4.6-40.el7_2.6.s390x.rpm
mod_proxy_html-2.4.6-40.el7_2.6.s390x.rpm
mod_session-2.4.6-40.el7_2.6.s390x.rpm

x86_64:
httpd-debuginfo-2.4.6-40.el7_2.6.x86_64.rpm
mod_ldap-2.4.6-40.el7_2.6.x86_64.rpm
mod_proxy_html-2.4.6-40.el7_2.6.x86_64.rpm
mod_session-2.4.6-40.el7_2.6.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-2017-3167
https://access.redhat.com/security/cve/CVE-2017-3169
https://access.redhat.com/security/cve/CVE-2017-7668
https://access.redhat.com/security/cve/CVE-2017-7679
https://access.redhat.com/security/cve/CVE-2017-9788
https://access.redhat.com/security/cve/CVE-2017-9798
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 2017 Red Hat, Inc.
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