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

Synopsis:          Moderate: rh-nginx18-nginx security update
Advisory ID:       RHSA-2016:1425-01
Product:           Red Hat Software Collections
Advisory URL:      https://access.redhat.com/errata/RHSA-2016:1425
Issue date:        2016-07-14
CVE Names:         CVE-2016-0742 CVE-2016-0746 CVE-2016-0747 
                   CVE-2016-4450 
=====================================================================

1. Summary:

An update for rh-nginx18-nginx is now available for Red Hat Software
Collections.

Red Hat Product Security has rated this update as having a security impact
of Moderate. 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 Software Collections for Red Hat Enterprise Linux Server (v. 6) - x86_64
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) - x86_64
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) - x86_64
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) - x86_64
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1) - x86_64
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) - x86_64
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) - x86_64
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) - x86_64

3. Description:

Nginx is a web and proxy server with a focus on high concurrency,
performance, and low memory usage.

The following packages have been upgraded to a newer upstream version:
rh-nginx18-nginx (1.8.1).

Security Fix(es):

* A NULL pointer dereference flaw was found in the nginx code responsible
for saving client request body to a temporary file. A remote attacker could
send a specially crafted request that would cause nginx worker process to
crash. (CVE-2016-4450)

* It was discovered that nginx could perform an out of bound read and
dereference an invalid pointer when resolving CNAME DNS records. An
attacker able to manipulate DNS responses received by nginx could use this
flaw to cause a worker process to crash if nginx enabled the resolver in
its configuration. (CVE-2016-0742)

* A use-after-free flaw was found in the way nginx resolved certain CNAME
DNS records. An attacker able to manipulate DNS responses received by nginx
could use this flaw to cause a worker process to crash or, possibly,
execute arbitrary code if nginx enabled the resolver in its configuration.
(CVE-2016-0746)

* It was discovered that nginx did not limit recursion when resolving CNAME
DNS records. An attacker able to manipulate DNS responses received by nginx
could use this flaw to cause a worker process to use an excessive amount of
resources if nginx enabled the resolver in its configuration.
(CVE-2016-0747)

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

The rh-nginx18-nginx service must be restarted for this update to take
effect.

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

1302587 - CVE-2016-0742 nginx: invalid pointer dereference in resolver
1302588 - CVE-2016-0746 nginx: use-after-free during CNAME response processing in resolver
1302589 - CVE-2016-0747 nginx: Insufficient limits of CNAME resolution in resolver
1341462 - CVE-2016-4450 nginx: NULL pointer dereference while writing client request body

6. Package List:

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6):

Source:
rh-nginx18-nginx-1.8.1-1.el6.src.rpm

x86_64:
rh-nginx18-nginx-1.8.1-1.el6.x86_64.rpm
rh-nginx18-nginx-debuginfo-1.8.1-1.el6.x86_64.rpm

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6):

Source:
rh-nginx18-nginx-1.8.1-1.el6.src.rpm

x86_64:
rh-nginx18-nginx-1.8.1-1.el6.x86_64.rpm
rh-nginx18-nginx-debuginfo-1.8.1-1.el6.x86_64.rpm

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7):

Source:
rh-nginx18-nginx-1.8.1-1.el6.src.rpm

x86_64:
rh-nginx18-nginx-1.8.1-1.el6.x86_64.rpm
rh-nginx18-nginx-debuginfo-1.8.1-1.el6.x86_64.rpm

Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6):

Source:
rh-nginx18-nginx-1.8.1-1.el6.src.rpm

x86_64:
rh-nginx18-nginx-1.8.1-1.el6.x86_64.rpm
rh-nginx18-nginx-debuginfo-1.8.1-1.el6.x86_64.rpm

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

Source:
rh-nginx18-nginx-1.8.1-1.el7.src.rpm

x86_64:
rh-nginx18-nginx-1.8.1-1.el7.x86_64.rpm
rh-nginx18-nginx-debuginfo-1.8.1-1.el7.x86_64.rpm

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1):

Source:
rh-nginx18-nginx-1.8.1-1.el7.src.rpm

x86_64:
rh-nginx18-nginx-1.8.1-1.el7.x86_64.rpm
rh-nginx18-nginx-debuginfo-1.8.1-1.el7.x86_64.rpm

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

Source:
rh-nginx18-nginx-1.8.1-1.el7.src.rpm

x86_64:
rh-nginx18-nginx-1.8.1-1.el7.x86_64.rpm
rh-nginx18-nginx-debuginfo-1.8.1-1.el7.x86_64.rpm

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

Source:
rh-nginx18-nginx-1.8.1-1.el7.src.rpm

x86_64:
rh-nginx18-nginx-1.8.1-1.el7.x86_64.rpm
rh-nginx18-nginx-debuginfo-1.8.1-1.el7.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-2016-0742
https://access.redhat.com/security/cve/CVE-2016-0746
https://access.redhat.com/security/cve/CVE-2016-0747
https://access.redhat.com/security/cve/CVE-2016-4450
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

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

Copyright 2016 Red Hat, Inc.
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