AIX 7.1 TL 3 : ntp (IV79943) (deprecated)

The remote AIX host has a version of Network Time Protocol NTP installed that is affected by the following vulnerabilities : - A divide-by-zero error exists in file include/ntp.h when handling LOGTOD and ULOGTOD macros in a crafted NTP packet. An unauthenticated, remote attacker can exploit this,...

Network Time Protocol Origin Timestamp Check Impersonation Vulnerability

CERT VU357792 Summary To distinguish legitimate peer responses from forgeries, a client attempts to verify a response packet by ensuring that the origin timestamp in an incoming packet matches the transmit timestamp it transmitted in its last request. A logic error exists that allows packets with...

Network Time Protocol ntpq and ntpdc Origin Timestamp Disclosure Vulnerability

CERT VU357792 Summary To prevent off-path attackers from impersonating legitimate peers, clients require that the origin timestamp in a received response packet match the transmit timestamp from its last request to a given peer. Under assumption that only the recipient of the request packet will...

Network Time Protocol ntpq Special Character Filtering Vulnerability

Summary The ntpq saveconfig command does not do adequate filtering of special characters from the supplied filename. Only back slash and forward slash are currently filtered out. There are other special characters that are allowed in the filename which can cause issues during globbing. In additio...

UBUNTU-CVE-2015-8158

The getresponse function in ntpq in NTP versions before 4.2.8p9 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service infinite loop via crafted packets with incorrect values...

UBUNTU-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-2015-7975

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...

UBUNTU-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...

UBUNTU-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...

UBUNTU-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...

CentOS 7 : chrony (CESA-2015:2241)

Updated chrony packages that fix three security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System CVSS base scores, which give...

ntp, ntpdate, sntp security update

CentOS Errata and Security Advisory CESA-2015:2231 Updated ntp packages that fix multiple security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Moderate security impact. Common...

Important: Red Hat Security Advisory: ntp security update

Updated ntp packages that fix one security issue are now available for Red Hat Enterprise Linux 6.5 and 6.6 Extended Update Support. Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System CVSS base score, which gives a detailed...

ntp: disabling synchronization via crafted KoD packet

It was discovered that ntpd as a client did not correctly check timestamps in Kiss-of-Death packets. A remote attacker could use this flaw to send a crafted Kiss-of-Death packet to an ntpd client that would increase the client's polling interval value, and effectively disable synchronization with...

Network Time Protocol Daemon Pidfile Driftfile Arbitrary File Overwrite (CVE-2015-7709)

An arbitrary file overwrite vulnerability exists in the Network Time Protocol daemon NTPD. The vulnerability is due to NTPD allowing remote clients to change the pidfile and driftfile configuration options to any arbitrary file, allowing any file on the target system to be overwritten. A remote,...

RHEL 7 : chrony (RHSA-2015:2241)

Updated chrony packages that fix three security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System CVSS base scores, which give...

ntp: drop packets with source address ::1

It was found that because NTP's access control was based on a source IP address, an attacker could bypass source IP restrictions and send malicious control and configuration packets by spoofing ::1 addresses...

ntp: ntpd accepts unauthenticated packets with symmetric key crypto

It was found that ntpd did not check whether a Message Authentication Code MAC was present in a received packet when ntpd was configured to use symmetric cryptographic keys. A man-in-the-middle attacker could use this flaw to send crafted packets that would be accepted by a client or a peer witho...

ntp: authentication doesn't protect symmetric associations against DoS attacks

A denial of service flaw was found in the way NTP hosts that were peering with each other authenticated themselves before updating their internal state variables. An attacker could send packets to one peer host, which could cascade to other peers, and stop the synchronization process among the...

ntp: drop packets with source address ::1

It was found that because NTP's access control was based on a source IP address, an attacker could bypass source IP restrictions and send malicious control and configuration packets by spoofing ::1 addresses...