From Red Hat Security Advisory 2016:1086 :

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.

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 (Viagenie) for reporting this issue.

Fix CVE-2016-3698

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Julien Bernard discovered that libndp, a library for the IPv6 Neighbor Discovery Protocol, does not properly perform input and origin checks during the reception of a NDP message. An attacker in a non-local network could use this flaw to advertise a node as a router, and cause a denial of service attack, or act as a man-in-the-middle.

Julien Bernard discovered that libndp incorrectly performed origin checks when receiving Neighbor Discovery Protocol (NDP) messages. A remote attacker outside of the local network could use this issue to advertise a node as a router, causing a denial of service, or possibly to act as a man in the middle.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the version of the libndp package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - 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)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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.

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 (Viagenie) for reporting this issue.

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)

ID	Name	Product	Family	Published	Updated	Severity
91212	Oracle Linux 7 : libndp (ELSA-2016-1086)	Nessus	Oracle Linux Local Security Checks	5/18/2016	1/14/2021	high
92060	Fedora 24 : libndp (2016-189e43cb4f)	Nessus	Fedora Local Security Checks	7/14/2016	1/11/2021	high
91199	Debian DSA-3581-1 : libndp - security update	Nessus	Debian Local Security Checks	5/18/2016	1/11/2021	high
91218	Ubuntu 16.04 LTS : libndp vulnerability (USN-2980-1)	Nessus	Ubuntu Local Security Checks	5/18/2016	10/20/2023	high
99785	EulerOS 2.0 SP1 : libndp (EulerOS-SA-2016-1022)	Nessus	Huawei Local Security Checks	5/1/2017	1/6/2021	high
92073	Fedora 22 : libndp (2016-2be4263b24)	Nessus	Fedora Local Security Checks	7/14/2016	1/11/2021	high
92100	Fedora 23 : libndp (2016-5cbcaebaf2)	Nessus	Fedora Local Security Checks	7/14/2016	1/11/2021	high
91195	CentOS 7 : libndp (CESA-2016:1086)	Nessus	CentOS Local Security Checks	5/18/2016	1/4/2021	high
91214	RHEL 7 : libndp (RHSA-2016:1086)	Nessus	Red Hat Local Security Checks	5/18/2016	10/24/2019	high
91296	Scientific Linux Security Update : libndp on SL7.x x86_64 (20160517)	Nessus	Scientific Linux Local Security Checks	5/23/2016	1/14/2021	high

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