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Red Hat: RHSA-2016:1086-01 Moderate: libndp Man-In-The-Middle Issue

red hat
Calendar Grey May 17, 2016
Scroller Redhat
An essential libndp security patch for Red Hat Enterprise Linux tackles risks linked to internet-based threats.
An update for libndp is now available for Red Hat Enterprise Linux 7

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.

Summary

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.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat network attack MITM libndp

References

https://access.redhat.com/security/cve/CVE-2016-3698 https://access.redhat.com/security/updates/classification/#moderate

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


Read the Full Advisory


Advisory ID: RHSA-2016:1086-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:1086.html
Issue date: 2016-05-17

Topic

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 impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat network attack MITM libndp

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

Bugs Fixed

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

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