Cisco IOS and IOS XE Software Crafted Network Time Protocol Packets Denial of Service Vulnerability

A vulnerability in the processing of Network Time Protocol NTP packets by Cisco IOS and Cisco IOS XE could allow an unauthenticated, remote attacker to cause an interface wedge and an eventual denial of service DoS condition on the affected device. The vulnerability is due to insufficient checks ...

ntp: crypto-NAK preemptable association denial of service

A denial of service flaw was found in the way NTP handled preemptable client associations. A remote attacker could send several crypto NAK packets to a victim client, each with a spoofed source address of an existing associated peer, preventing that client from synchronizing its time...

ntp: libntp message digest disclosure

A flaw was found in the way NTP's libntp performed message authentication. An attacker able to observe the timing of the comparison function used in packet authentication could potentially use this flaw to recover the message digest...

ntp: off-path denial of service on authenticated broadcast mode

It was found that when NTP was configured in broadcast mode, a remote attacker could broadcast packets with bad authentication to all clients. The clients, upon receiving the malformed packets, would break the association with the broadcast server, causing them to become out of sync over a longer...

ntp: out-of-bounds references on crafted packet

An out-of-bounds access flaw was found in the way ntpd processed certain packets. An authenticated attacker could use a crafted packet to create a peer association with hmode of 7 and larger, which could potentially although highly unlikely cause ntpd to crash...

ntp: ntpd switching to interleaved mode with spoofed packets

It was found that an ntpd client could be forced to change from basic client/server mode to the interleaved symmetric mode. A remote attacker could use a spoofed packet that, when processed by an ntpd client, would cause that client to reject all future legitimate server responses, effectively...

Moderate: Red Hat Security Advisory: ntp security update

An update for ntp 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 Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each...

Debian: Security Advisory (DSA-3629-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2016 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Debian DSA-3629-1 : ntp - security update

Several vulnerabilities were discovered in the Network Time Protocol daemon and utility programs : - CVE-2015-7974 Matt Street discovered that insufficient key validation allows impersonation attacks between authenticated peers. - CVE-2015-7977 CVE-2015-7978 Stephen Gray discovered that a NULL...

Debian DLA-559-1 : ntp security update

Several vulnerabilities were discovered in the Network Time Protocol daemon and utility programs : CVE-2015-7974 Matt Street discovered that insufficient key validation allows impersonation attacks between authenticated peers. CVE-2015-7977 / CVE-2015-7978 Stephen Gray discovered that a NULL...

DSA-3629-1 ntp - security update

Bulletin has no description...

DLA-559-1 ntp - security update

Bulletin has no description...

Meinberg NTP Time Server ELX800/GPS M4x V5.30p - Remote Command Execution / Escalate Privileges

!/usr/bin/python EDB Note: Source https://github.com/securifera/CVE-2016-3962-Exploit EDB Note: More info https://www.securifera.com/blog/2016/07/17/time-to-patch-rce-on-meinberg-ntp-time-server/ 271 - trigger notifications 299 - copy user defined notifications Kernel Version: 2.6.15.1 System...

DEBIAN-CVE-2016-4957

ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service daemon crash via a crypto-NAK packet. NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547...

DEBIAN-CVE-2016-4956

ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service interleaved-mode transition and time change via a spoofed broadcast packet. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-1548...

DEBIAN-CVE-2016-4955

ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service peer-variable clearing and association outage by sending 1 a spoofed crypto-NAK packet or 2 a packet with an incorrect MAC value at a certain time...

DEBIAN-CVE-2016-4954

The processpacket function in ntpproto.c in ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service peer-variable modification by sending spoofed packets from many source IP addresses in a certain scenario, as demonstrated by triggering an incorrect leap indication...

UBUNTU-CVE-2016-4956

ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service interleaved-mode transition and time change via a spoofed broadcast packet. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-1548...

UBUNTU-CVE-2016-4954

The processpacket function in ntpproto.c in ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service peer-variable modification by sending spoofed packets from many source IP addresses in a certain scenario, as demonstrated by triggering an incorrect leap indication...

UBUNTU-CVE-2016-4955

ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service peer-variable clearing and association outage by sending 1 a spoofed crypto-NAK packet or 2 a packet with an incorrect MAC value at a certain time...