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Files from Network Time Foundation

First Active2016-01-15
Last Active2017-04-12
FreeBSD Security Advisory - FreeBSD-SA-17:03.ntp
Posted Apr 12, 2017
Authored by Network Time Foundation | Site security.freebsd.org

FreeBSD Security Advisory - A vulnerability was discovered in the NTP server's parsing of configuration directives. A vulnerability was found in NTP, in the parsing of packets from the DPTS Clock. A vulnerability was discovered in the NTP server's parsing of configuration directives. A vulnerability was found in NTP, affecting the origin timestamp check function. A remote, authenticated attacker could cause ntpd to crash by sending a crafted message. A malicious device could send crafted messages, causing ntpd to crash. An attacker able to spoof messages from all of the configured peers could send crafted packets to ntpd, causing later replies from those peers to be discarded, resulting in denial of service.

tags | advisory, remote, denial of service, spoof
systems | freebsd, bsd
advisories | CVE-2016-9042, CVE-2017-6462, CVE-2017-6463, CVE-2017-6464
MD5 | c169a99d362c1ddf8d4e9d7e28573bae
FreeBSD Security Advisory - FreeBSD-SA-16.39.ntp
Posted Dec 21, 2016
Authored by Network Time Foundation | Site security.freebsd.org

FreeBSD Security Advisory - Multiple vulnerabilities have been discovered in the NTP suite.

tags | advisory, vulnerability
systems | freebsd, bsd
advisories | CVE-2016-7426, CVE-2016-7427, CVE-2016-7428, CVE-2016-7431
MD5 | 758701c6c332f8937e8764717b895f4a
FreeBSD Security Advisory - FreeBSD-SA-16:02.ntp
Posted Jan 15, 2016
Authored by Network Time Foundation

FreeBSD Security Advisory - The ntpd(8) daemon has a safety feature to prevent excessive stepping of the clock called the "panic threshold". If ever ntpd(8) determines the system clock is incorrect by more than this threshold, the daemon exits. There is an implementation error within the ntpd(8) implementation of this feature, which allows the system time be adjusted in certain circumstances. When ntpd(8) is started with the '-g' option specified, the system time will be corrected regardless of if the time offset exceeds the panic threshold (by default, 1000 seconds). The FreeBSD rc(8) subsystem allows specifying the '-g' option by either including '-g' in the ntpd_flags list or by enabling ntpd_sync_on_start in the system rc.conf(5) file. If at the moment ntpd(8) 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 opportunity where the attacker can cause ntpd(8) to set the time to an arbitrary value.

tags | advisory, arbitrary
systems | freebsd
advisories | CVE-2015-5300
MD5 | e07f765ea6647a5883adc34978841734
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