CVE-2015-1799

The symmetric-key feature in the receive function in ntpproto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service synchronization loss by spoofing the...

ntp: multiple issues

CVE-2015-1798 accept unauthenticated packets: When ntpd is configured to use a symmetric key to authenticate a remote NTP server/peer, it checks if the NTP message authentication code MAC in received packets is valid, but not if there actually is any MAC included. Packets without a MAC are accept...

CVE-2015-1798

The symmetric-key feature in the receive function in ntpproto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC...

chrony: denial of service

CVE-2015-1853 denial of service: This issue is similiar to the "ntp CVE-2015-1799"-issue. An attacker knowing that NTP hosts A and B are peering with each other symmetric association can send a packet to host A with source address of B which will set the NTP state variables on A to the values sen...

FreeBSD : ntp -- multiple vulnerabilities (ebd84c96-dd7e-11e4-854e-3c970e169bc2)

ntp.org reports : - Sec 2779 ntpd accepts unauthenticated packets with symmetric key crypto. - Sec 2781 Authentication doesn't protect symmetric associations against DoS attacks. %NASLMINLEVEL 70300 C Tenable Network Security, Inc. The descriptive text and package checks in this plugin were...

UBUNTU-CVE-2015-1799

The symmetric-key feature in the receive function in ntpproto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service synchronization loss by spoofing the...

Vulnerabilities Identified in Network Time Protocol Daemon (ntpd)

The Network Time Foundation's NTP Project has released an update addressing multiple vulnerabilities in ntpd. Exploitation of these vulnerabilities may allow an attacker to conduct a man-in-the-middle attack or cause a denial of service condition. Users and administrators are encouraged to review...

FreeBSD Security Advisory FreeBSD-SA-15:07.ntp

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-15:07.ntp Security Advisory The FreeBSD Project Topic: Multiple vulnerabilities of ntp Category: contrib Module: ntp Announced: 2015-04-07 Credits: Network Time...

CVE-2015-1799

The symmetric-key feature in the receive function in ntpproto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service synchronization loss by spoofing the...

NTP Project ntpd reference implementation contains multiple vulnerabilities

Overview NTP Project ntpd reference implementation accepts unauthenticated packets with symmetric key cryptography and does not protect symmetric associations against denial of service attacks. Description CVE-2015-1798, bug 2779:In NTP4 installations utilizing symmetric key authentication,...

FreeBSD-SA-15:07.ntp

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-15:07.ntp Security Advisory The FreeBSD Project Topic: Multiple vulnerabilities of ntp Category: contrib Module: ntp Announced: 2015-04-07 Credits: Network Time...

ntp -- multiple vulnerabilities

ntp.org reports: Sec 2779 ntpd accepts unauthenticated packets with symmetric key crypto. Sec 2781 Authentication doesn't protect symmetric associations against DoS attacks...

Mandriva Linux Security Advisory : ntp (MDVSA-2015:140)

Updated ntp packages fix security vulnerabilities : If no authentication key is defined in the ntp.conf file, a cryptographically-weak default key is generated CVE-2014-9293. ntp-keygen before 4.2.7p230 uses a non-cryptographic random number generator with a weak seed to generate symmetric keys...

Debian DLA-149-1 : ntp security update

Several vulnerabilities were discovered in the ntp package, an implementation of the Network Time Protocol. The Common Vulnerabilities and Exposures project identifies the following problems : CVE-2014-9297 Stephen Roettger of the Google Security Team, Sebastian Krahmer of the SUSE Security Team...

Debian DLA-116-1 : ntp security update

Several vulnerabilities were discovered in the ntp package, an implementation of the Network Time Protocol. CVE-2014-9293 ntpd generated a weak key for its internal use, with full administrative privileges. Attackers could use this key to reconfigure ntpd or to exploit other vulnerabilities...

IT-Grundschutz M4.227: Einsatz eines lokalen NTP-Servers zur Zeitsynchronisation

IT-Grundschutz M4.227: Einsatz eines lokalen NTP-Servers zur Zeitsynchronisation. Stand: 14. Ergänzungslieferung 14. EL. OpenVAS Vulnerability Test $Id: GSHBM4227.nasl 7883 2017-11-23 11:22:59Z emoss $ IT-Grundschutz, 14. EL, Maßnahme 4.227 Authors: Thomas Rotter Copyright: Copyright c 2015...

IT-Grundschutz M4.227: Einsatz eines lokalen NTP-Servers zur Zeitsynchronisation

IT-Grundschutz M4.227: Einsatz eines lokalen NTP-Servers zur Zeitsynchronisation. Stand: 14. Ergnzungslieferung 14. EL. SPDX-FileCopyrightText: 2015 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders...

Amazon Linux AMI : ntp (ALAS-2015-496)

It was reported that ntp misses validation of vallen value, leading to various information leaks. See for more details. CVE-2014-9297 It was reported that ntp allows bypassing source IP ACLs on some OSes when ::1 spoofed. CVE-2014-9298 C Tenable Network Security, Inc. The descriptive text and...

Medium: ntp

Issue Overview: It was reported http://bugs.ntp.org/showbug.cgi?id=2671 that ntp misses validation of vallen value, leading to various information leaks. See for more details. CVE-2014-9297 It was reported http://bugs.ntp.org/showbug.cgi?id=2672 that ntp allows bypassing source IP ACLs on some OS...

Network Time Protocol Daemon (ntpd) 4.x < 4.2.8p1 Multiple Vulnerabilities

The version of the remote NTP server is 4.x prior to 4.2.8p1. It is, therefore, affected by the following vulnerabilities : - A security weakness exists due to the configauth function improperly generating default keys when no authentication key is defined in the ntp.conf file. Key size is limite...