ntp, ntpdate, sntp security update

CentOS Errata and Security Advisory CESA-2020:2663 An update for ntp 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...

ntp: DoS on client ntpd using server mode packet

A flaw was found in the Network Time Protocol NTP, where a security issue exists that allows an off-path attacker to prevent the Network Time Protocol daemon ntpd from synchronizing with NTP servers not using authentication. A server mode packet with a spoofed source address sent to the client nt...

ntp: ntpd using highly predictable transmit timestamps could result in time change or DoS

A high-performance ntpd instance that gets its time from unauthenticated IPv4 time sources may be vulnerable to an off-path attacker who can query time from the victim's ntpd instance. An attacker who can send a large number of packets with the spoofed IPv4 address of the upstream server can use...

ntp input validation error vulnerability

Network Time Protocol NTP, Network Time Protocol is a network protocol that synchronizes the clocks of two computers by exchanging packets. A security vulnerability exists in ntpd in versions prior to ntp 4.2.8p14 and 4.3.100 prior to 4.3.x. A remote attacker could exploit this vulnerability by...

DEBIAN-CVE-2020-13817

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service daemon exit or system time change by predicting transmit timestamps for use in spoofed packets. The victim must be relying on unauthenticated IPv4 time sources. There must be an off-path...

UBUNTU-CVE-2020-13817

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service daemon exit or system time change by predicting transmit timestamps for use in spoofed packets. The victim must be relying on unauthenticated IPv4 time sources. There must be an off-path...

Network Time Protocol Input Validation Error Vulnerability

Network Time Protocol NTP, Network Time Protocol is a network protocol that synchronizes the clocks of two computers by exchanging packets. A security vulnerability exists in ntpd in NTP. A remote attacker could use this vulnerability to prevent a broadcast client from synchronizing its clock wit...

Debian DLA-2201-1 : ntp security update

A Denial of Service DoS vulnerability was discovered in the network time protocol server/client, ntp. ntp allowed an 'off-path' attacker to block unauthenticated synchronisation via a server mode packet with a spoofed source IP address because transmissions were rescheduled even if a packet lacke...

DEBIAN-CVE-2018-8956

ntpd in ntp 4.2.8p10, 4.2.8p11, 4.2.8p12 and 4.2.8p13 allow remote attackers to prevent a broadcast client from synchronizing its clock with a broadcast NTP server via soofed mode 3 and mode 5 packets. The attacker must either be a part of the same broadcast network or control a slave in that...

UBUNTU-CVE-2018-8956

ntpd in ntp 4.2.8p10, 4.2.8p11, 4.2.8p12 and 4.2.8p13 allow remote attackers to prevent a broadcast client from synchronizing its clock with a broadcast NTP server via soofed mode 3 and mode 5 packets. The attacker must either be a part of the same broadcast network or control a slave in that...

CVE-2020-11868

A flaw was found in the Network Time Protocol NTP, where a security issue exists that allows an off-path attacker to prevent the Network Time Protocol daemon ntpd from synchronizing with NTP servers not using authentication. A server mode packet with a spoofed source address sent to the client nt...

DEBIAN-CVE-2020-11868

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows an off-path attacker to block unauthenticated synchronization via a server mode packet with a spoofed source IP address, because transmissions are rescheduled even when a packet lacks a valid origin timestamp...

UBUNTU-CVE-2020-11868

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows an off-path attacker to block unauthenticated synchronization via a server mode packet with a spoofed source IP address, because transmissions are rescheduled even when a packet lacks a valid origin timestamp...

NTP ntpd Denial of Service Vulnerability (CNVD-2020-24010)

Network Time Protocol NTP is a network protocol that synchronizes the clocks of two computers by exchanging packets. ntpd is one of the operating system daemons that uses NTP to synchronize with the system time of a time server. A security vulnerability exists in ntpd in versions of NTP prior to...

ntp: Stack-based buffer overflow in ntpq and ntpdc allows denial of service or code execution

The ntpq and ntpdc command-line utilities that are part of ntp package are vulnerable to stack-based buffer overflow via crafted hostname. Applications using these vulnerable utilities with an untrusted input may be potentially exploited, resulting in a crash or arbitrary code execution under...

Stack-based Buffer Overflow

The Network Time Protocol NTP is vulnerable to Stack-based Buffer Overflow. A buffer overflow flaw was found in the ntpq diagnostic command. A malicious, remote server could send a specially-crafted reply to an ntpq request that could crash ntpq or, potentially, execute arbitrary code with the...

VulnCheck KEV: CVE-2025-34129

A command injection vulnerability exists in LILIN Digital Video Recorder DVR devices prior to firmware version 2.0b6020200207 due to insufficient sanitization of the FTP and NTP Server fields in the service configuration. An attacker with access to the configuration interface can upload a...

FreeBSD-SA-20:09.ntp

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-20:09.ntp Security Advisory The FreeBSD Project Topic: Multiple denial of service in ntpd Category: contrib Module: ntp Announced: 2020-03-19 Credits: Philippe...

Linux: Read /etc/ntp.conf (KB)

The ntpd program is an operating system daemon which sets and maintains the system time of day in synchronism with Internet standard time servers. It is a complete implementation of the Network Time Protocol NTP version 4, but also retains compatibility with version 3, as defined by RFC-1305, and...

CVE-2019-5172

An exploitable command injection vulnerability exists in the iocheckd service ‘I/O-Check’ function of the WAGO PFC 200 Firmware version 03.02.0214. An attacker can send a specially crafted packet to trigger the parsing of this cache file. At 0x1e840 the extracted ntp value from the xml file is us...