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

Synopsis:          Moderate: libndp security update
Advisory ID:       RHSA-2016:1086-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2016-1086.html
Issue date:        2016-05-17
CVE Names:         CVE-2016-3698 
=====================================================================

1. Summary:

An update for libndp is now available for Red Hat Enterprise Linux 7.

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 Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

Libndp is a library (used by NetworkManager) that provides a wrapper for
the IPv6 Neighbor Discovery Protocol. It also provides a tool named ndptool
for sending and receiving NDP messages.

Security Fix(es):

* It was found that libndp did not properly validate and check the origin
of Neighbor Discovery Protocol (NDP) messages. An attacker on a non-local
network could use this flaw to advertise a node as a router, allowing them
to perform man-in-the-middle attacks on a connecting client, or disrupt the
network connectivity of that client. (CVE-2016-3698)

Red Hat would like to thank Julien Bernard (Viagénie) for reporting this
issue.

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 this update, all running applications using libndp (for
example, Network Manager) must be restarted for this update to take effect.

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

1329366 - CVE-2016-3698 libndp: denial of service due to insufficient validation of source of NDP messages

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
libndp-1.2-6.el7_2.src.rpm

x86_64:
libndp-1.2-6.el7_2.i686.rpm
libndp-1.2-6.el7_2.x86_64.rpm
libndp-debuginfo-1.2-6.el7_2.i686.rpm
libndp-debuginfo-1.2-6.el7_2.x86_64.rpm

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

x86_64:
libndp-debuginfo-1.2-6.el7_2.i686.rpm
libndp-debuginfo-1.2-6.el7_2.x86_64.rpm
libndp-devel-1.2-6.el7_2.i686.rpm
libndp-devel-1.2-6.el7_2.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
libndp-1.2-6.el7_2.src.rpm

x86_64:
libndp-1.2-6.el7_2.i686.rpm
libndp-1.2-6.el7_2.x86_64.rpm
libndp-debuginfo-1.2-6.el7_2.i686.rpm
libndp-debuginfo-1.2-6.el7_2.x86_64.rpm

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

x86_64:
libndp-debuginfo-1.2-6.el7_2.i686.rpm
libndp-debuginfo-1.2-6.el7_2.x86_64.rpm
libndp-devel-1.2-6.el7_2.i686.rpm
libndp-devel-1.2-6.el7_2.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
libndp-1.2-6.el7_2.src.rpm

ppc64:
libndp-1.2-6.el7_2.ppc.rpm
libndp-1.2-6.el7_2.ppc64.rpm
libndp-debuginfo-1.2-6.el7_2.ppc.rpm
libndp-debuginfo-1.2-6.el7_2.ppc64.rpm

ppc64le:
libndp-1.2-6.el7_2.ppc64le.rpm
libndp-debuginfo-1.2-6.el7_2.ppc64le.rpm

s390x:
libndp-1.2-6.el7_2.s390.rpm
libndp-1.2-6.el7_2.s390x.rpm
libndp-debuginfo-1.2-6.el7_2.s390.rpm
libndp-debuginfo-1.2-6.el7_2.s390x.rpm

x86_64:
libndp-1.2-6.el7_2.i686.rpm
libndp-1.2-6.el7_2.x86_64.rpm
libndp-debuginfo-1.2-6.el7_2.i686.rpm
libndp-debuginfo-1.2-6.el7_2.x86_64.rpm

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

ppc64:
libndp-debuginfo-1.2-6.el7_2.ppc.rpm
libndp-debuginfo-1.2-6.el7_2.ppc64.rpm
libndp-devel-1.2-6.el7_2.ppc.rpm
libndp-devel-1.2-6.el7_2.ppc64.rpm

ppc64le:
libndp-debuginfo-1.2-6.el7_2.ppc64le.rpm
libndp-devel-1.2-6.el7_2.ppc64le.rpm

s390x:
libndp-debuginfo-1.2-6.el7_2.s390.rpm
libndp-debuginfo-1.2-6.el7_2.s390x.rpm
libndp-devel-1.2-6.el7_2.s390.rpm
libndp-devel-1.2-6.el7_2.s390x.rpm

x86_64:
libndp-debuginfo-1.2-6.el7_2.i686.rpm
libndp-debuginfo-1.2-6.el7_2.x86_64.rpm
libndp-devel-1.2-6.el7_2.i686.rpm
libndp-devel-1.2-6.el7_2.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
libndp-1.2-6.el7_2.src.rpm

x86_64:
libndp-1.2-6.el7_2.i686.rpm
libndp-1.2-6.el7_2.x86_64.rpm
libndp-debuginfo-1.2-6.el7_2.i686.rpm
libndp-debuginfo-1.2-6.el7_2.x86_64.rpm

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

x86_64:
libndp-debuginfo-1.2-6.el7_2.i686.rpm
libndp-debuginfo-1.2-6.el7_2.x86_64.rpm
libndp-devel-1.2-6.el7_2.i686.rpm
libndp-devel-1.2-6.el7_2.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-2016-3698
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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