NTP < 4.2 DoS Vulnerability

Buffer overflow in ntpd ntp daemon 4.0.99k and earlier aka xntpd and xntp3 allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long readvar argument. SPDX-FileCopyrightText: 2021 Greenbone AG Some text descriptions might be excerpted from a reference...

NTP < 4.0 Integer Overflow or Wraparound Vulnerability

Integer overflow in the NTP daemon NTPd before 4.0 causes the NTP server to return the wrong date/time offset when a client requests a date/time that is more than 34 years away from the server SPDX-FileCopyrightText: 2021 Greenbone AG Some text descriptions might be excerpted from a referenced...

NTP < 4.2.8p5 DoS Vulnerability

If ntpd is always started with the -g option, which is common and against long-standing recommendation, and if at the moment ntpd is restarted an attacker can immediately respond to enough requests from enough sources trusted by the target, which is difficult and not common, there is a window of...

CVE-2021-22212

ntpkeygen can generate keys that ntpd fails to parse. NTPsec 1.2.0 allows ntpkeygen to generate keys with '' characters. ntpd then either pads, shortens the key, or fails to load these keys entirely, depending on the key type and the placement of the ''. This results in the administrator not bein...

CVE-2021-22212

ntpkeygen can generate keys that ntpd fails to parse. NTPsec 1.2.0 allows ntpkeygen to generate keys with '' characters. ntpd then either pads, shortens the key, or fails to load these keys entirely, depending on the key type and the placement of the ''. This results in the administrator not bein...

EulerOS Virtualization 2.9.1 : ntp (EulerOS-SA-2021-1616)

According to the versions of the ntp package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - 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...

Denial Of Service (DoS)

ntpd is vulnerable to denial of service. A remote attacker is able to cause a denial of service memory consumption by sending malicious packets due to memory not bring freed in situations where a CMAC key is used and associated with a CMAC algorithm in the ntp.keys file...

Medium: ntp

Issue Overview: 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 ...

CVE-2020-15025

ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of service memory consumption by sending packets, because memory is not freed in situations where a CMAC key is used and associated with a CMAC algorithm in the ntp.keys file...

CVE-2020-15025

ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of service memory consumption by sending packets, because memory is not freed in situations where a CMAC key is used and associated with a CMAC algorithm in the ntp.keys file...

Design/Logic Flaw

ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of service memory consumption by sending packets, because memory is not freed in situations where a CMAC key is used and associated with a CMAC algorithm in the ntp.keys file...

CVE-2020-15025

ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of service memory consumption by sending packets, because memory is not freed in situations where a CMAC key is used and associated with a CMAC algorithm in the ntp.keys file...

CVE-2020-15025

ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of service memory consumption by sending packets, because memory is not freed in situations where a CMAC key is used and associated with a CMAC algorithm in the ntp.keys file...

CVE-2020-15025

ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of service memory consumption by sending packets, because memory is not freed in situations where a CMAC key is used and associated with a CMAC algorithm in the ntp.keys file...

Vulnerability fixed in ntpd

A vulnerability has been fixed in the ntp client daemon. The vulnerability allows an unauthenticated remote malicious person able to perform a denial-of-service attack. The developers of ntpd have released updates to fix the vulnerability. More information can be found on the pages below:...

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...

Moderate: Red Hat Security Advisory: ntp security update

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 rating, is available for each vulnerability from the CV...

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-2020-13817

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...

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...