ntp: Client rate limiting and server responses

It was found that when ntp is configured with rate limiting for all associations the limits are also applied to responses received from its configured sources. A remote attacker who knows the sources can cause a denial of service by preventing ntpd from accepting valid responses from its sources...

Moderate: Red Hat Security Advisory: ntp security update

An update for ntp is now available for Red Hat Enterprise Linux 6 and 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...

DEBIAN-CVE-2016-2518

The MATCHASSOC function in NTP before version 4.2.8p9 and 4.3.x before 4.3.92 allows remote attackers to cause an out-of-bounds reference via an addpeer request with a large hmode value...

DEBIAN-CVE-2016-2516

NTP before 4.2.8p7 and 4.3.x before 4.3.92, when mode7 is enabled, allows remote attackers to cause a denial of service ntpd abort by using the same IP address multiple times in an unconfig directive...

DEBIAN-CVE-2016-2519

ntpd in NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service ntpd abort by a large request data value, which triggers the ctlgetitem function to return a NULL value...

DEBIAN-CVE-2015-7973

NTP before 4.2.8p6 and 4.3.x before 4.3.90, when configured in broadcast mode, allows man-in-the-middle attackers to conduct replay attacks by sniffing the network...

DEBIAN-CVE-2015-7979

NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service client-server association tear down by sending broadcast packets with invalid authentication to a broadcast client...

UBUNTU-CVE-2016-2517

NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service prevent subsequent authentication by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey. NOTE:...

DEBIAN-CVE-2015-8139

ntpq in NTP before 4.2.8p7 allows remote attackers to obtain origin timestamps and then impersonate peers via unspecified vectors...

CVE-2015-7973

NTP before 4.2.8p6 and 4.3.x before 4.3.90, when configured in broadcast mode, allows man-in-the-middle attackers to conduct replay attacks by sniffing the network...

CVE-2015-7979

NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service client-server association tear down by sending broadcast packets with invalid authentication to a broadcast client...

UBUNTU-CVE-2015-8139

ntpq in NTP before 4.2.8p7 allows remote attackers to obtain origin timestamps and then impersonate peers via unspecified vectors...

DEBIAN-CVE-2015-7977

ntpd in NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service NULL pointer dereference via a ntpdc reslist command...

DEBIAN-CVE-2015-7975

The nextvar function in NTP before 4.2.8p6 and 4.3.x before 4.3.90 does not properly validate the length of its input, which allows an attacker to cause a denial of service application crash...

CVE-2015-7978

NTP before 4.2.8p6 and 4.3.0 before 4.3.90 allows a remote attackers to cause a denial of service stack exhaustion via an ntpdc relist command, which triggers recursive traversal of the restriction list...

CVE-2015-7977

ntpd in NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service NULL pointer dereference via a ntpdc reslist command...

UBUNTU-CVE-2015-8140

The ntpq protocol in NTP before 4.2.8p7 allows remote attackers to conduct replay attacks by sniffing the network...

DEBIAN-CVE-2015-8140

The ntpq protocol in NTP before 4.2.8p7 allows remote attackers to conduct replay attacks by sniffing the network...

DEBIAN-CVE-2015-8138

NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to bypass the origin timestamp validation via a packet with an origin timestamp set to zero...

DEBIAN-CVE-2015-7976

The ntpq saveconfig command in NTP 4.1.2, 4.2.x before 4.2.8p6, 4.3, 4.3.25, 4.3.70, and 4.3.77 does not properly filter special characters, which allows attackers to cause unspecified impact via a crafted filename...