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Red Hat Security Advisory
Synopsis: Important: httpd security update
Advisory ID: RHSA-2017:3195-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:3195
Issue date: 2017-11-13
CVE Names: CVE-2017-3167 CVE-2017-3169 CVE-2017-7679
CVE-2017-9788 CVE-2017-9798
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1. Summary:
An update for httpd is now available for Red Hat Enterprise Linux 6.7
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 HPC Node EUS (v. 6.7) – x86_64
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) – noarch, x86_64
Red Hat Enterprise Linux Server EUS (v. 6.7) – i386, noarch, ppc64, 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 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 Böck 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
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 HPC Node EUS (v. 6.7):
Source:
httpd-2.2.15-47.el6_7.5.src.rpm
x86_64:
httpd-2.2.15-47.el6_7.5.x86_64.rpm
httpd-debuginfo-2.2.15-47.el6_7.5.x86_64.rpm
httpd-tools-2.2.15-47.el6_7.5.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7):
noarch:
httpd-manual-2.2.15-47.el6_7.5.noarch.rpm
x86_64:
httpd-debuginfo-2.2.15-47.el6_7.5.i686.rpm
httpd-debuginfo-2.2.15-47.el6_7.5.x86_64.rpm
httpd-devel-2.2.15-47.el6_7.5.i686.rpm
httpd-devel-2.2.15-47.el6_7.5.x86_64.rpm
mod_ssl-2.2.15-47.el6_7.5.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 6.7):
Source:
httpd-2.2.15-47.el6_7.5.src.rpm
i386:
httpd-2.2.15-47.el6_7.5.i686.rpm
httpd-debuginfo-2.2.15-47.el6_7.5.i686.rpm
httpd-devel-2.2.15-47.el6_7.5.i686.rpm
httpd-tools-2.2.15-47.el6_7.5.i686.rpm
mod_ssl-2.2.15-47.el6_7.5.i686.rpm
noarch:
httpd-manual-2.2.15-47.el6_7.5.noarch.rpm
ppc64:
httpd-2.2.15-47.el6_7.5.ppc64.rpm
httpd-debuginfo-2.2.15-47.el6_7.5.ppc.rpm
httpd-debuginfo-2.2.15-47.el6_7.5.ppc64.rpm
httpd-devel-2.2.15-47.el6_7.5.ppc.rpm
httpd-devel-2.2.15-47.el6_7.5.ppc64.rpm
httpd-tools-2.2.15-47.el6_7.5.ppc64.rpm
mod_ssl-2.2.15-47.el6_7.5.ppc64.rpm
s390x:
httpd-2.2.15-47.el6_7.5.s390x.rpm
httpd-debuginfo-2.2.15-47.el6_7.5.s390.rpm
httpd-debuginfo-2.2.15-47.el6_7.5.s390x.rpm
httpd-devel-2.2.15-47.el6_7.5.s390.rpm
httpd-devel-2.2.15-47.el6_7.5.s390x.rpm
httpd-tools-2.2.15-47.el6_7.5.s390x.rpm
mod_ssl-2.2.15-47.el6_7.5.s390x.rpm
x86_64:
httpd-2.2.15-47.el6_7.5.x86_64.rpm
httpd-debuginfo-2.2.15-47.el6_7.5.i686.rpm
httpd-debuginfo-2.2.15-47.el6_7.5.x86_64.rpm
httpd-devel-2.2.15-47.el6_7.5.i686.rpm
httpd-devel-2.2.15-47.el6_7.5.x86_64.rpm
httpd-tools-2.2.15-47.el6_7.5.x86_64.rpm
mod_ssl-2.2.15-47.el6_7.5.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-2017-7679
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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