ntp: missing key check allows impersonation between authenticated peers (VU#357792)

A flaw was found in the way NTP verified trusted keys during symmetric key authentication. An authenticated client A could use this flaw to modify a packet sent between a server B and a client C using a key that is different from the one known to the client A...

ntp: incomplete checks in ntp_crypto.c

It was found that the fix for CVE-2014-9750 was incomplete: three issues were found in the value length checks in NTP's ntpcrypto.c, where a packet with particular autokey operations that contained malicious data was not always being completely validated. A remote attacker could use a specially...

ntp: slow memory leak in CRYPTO_ASSOC

A memory leak flaw was found in ntpd's CRYPTOASSOC. If ntpd was configured to use autokey authentication, an attacker could send packets to ntpd that would, after several days of ongoing attack, cause it to run out of memory...

ntp: stack exhaustion in recursive traversal of restriction list

A stack-based buffer overflow flaw was found in the way ntpd processed 'ntpdc reslist' commands that queried restriction lists with a large amount of entries. A remote attacker could use this flaw to crash ntpd...

ntp: crash with crafted logconfig configuration command

It was found that ntpd could crash due to an uninitialized variable when processing malformed logconfig configuration commands...

ntp: incomplete checks in ntp_crypto.c

It was found that the fix for CVE-2014-9750 was incomplete: three issues were found in the value length checks in NTP's ntpcrypto.c, where a packet with particular autokey operations that contained malicious data was not always being completely validated. A remote attacker could use a specially...

ntp: config command can be used to set the pidfile and drift file paths

It was found that NTP's :config command could be used to set the pidfile and driftfile paths without any restrictions. A remote attacker could use this flaw to overwrite a file on the file system with a file containing the pid of the ntpd process immediately or the current estimated drift of the...

ntp: potential infinite loop in ntpq

A flaw was found in the way the ntpq client processed certain incoming packets in a loop in the getresponse function. A remote attacker could potentially use this flaw to crash an ntpq client instance...

ntp: infinite loop in sntp processing crafted packet

It was discovered that the sntp utility could become unresponsive due to being caught in an infinite loop when processing a crafted NTP packet...

ntp: off-path denial of service on authenticated broadcast mode

It was found that when NTP was configured in broadcast mode, a remote attacker could broadcast packets with bad authentication to all clients. The clients, upon receiving the malformed packets, would break the association with the broadcast server, causing them to become out of sync over a longer...

USN-3096-1: NTP vulnerabilities

Aanchal Malhotra discovered that NTP incorrectly handled authenticated broadcast mode. A remote attacker could use this issue to perform a replay attack. CVE-2015-7973 Matt Street discovered that NTP incorrectly verified peer associations of symmetric keys. A remote attacker could use this issue ...

Cisco IOS Denial of Service Vulnerability (CNVD-2016-06186)

Cisco IOS is an operating system developed by Cisco for its network devices. A denial of service vulnerability exists in Cisco IOS, which arises from the program's failure to properly handle invalid NTP packets. A remote attacker could exploit this vulnerability by sending a large number of...

CVE-2016-1478

Cisco IOS 15.53S3, 15.61S2, 15.62S1, and 15.62T1 does not properly dequeue invalid NTP packets, which allows remote attackers to cause a denial of service interface wedge by sending many crafted NTP packets, aka Bug ID CSCva35619...

UBUNTU-CVE-2016-3831

The telephony component in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-08-01 allows remote attackers to cause a denial of service device crash via a NITZ time value of 2038-01-19 or later that is mishandled by the system clock, aka internal bug 29083635,...

Cisco IOS and IOS XE Software Crafted Network Time Protocol Packets Denial of Service Vulnerability

A vulnerability in the processing of Network Time Protocol NTP packets by Cisco IOS and Cisco IOS XE could allow an unauthenticated, remote attacker to cause an interface wedge and an eventual denial of service DoS condition on the affected device. The vulnerability is due to insufficient checks ...

ntp: out-of-bounds references on crafted packet

An out-of-bounds access flaw was found in the way ntpd processed certain packets. An authenticated attacker could use a crafted packet to create a peer association with hmode of 7 and larger, which could potentially although highly unlikely cause ntpd to crash...

ntp: crypto-NAK preemptable association denial of service

A denial of service flaw was found in the way NTP handled preemptable client associations. A remote attacker could send several crypto NAK packets to a victim client, each with a spoofed source address of an existing associated peer, preventing that client from synchronizing its time...

Moderate: Red Hat Security Advisory: ntp security update

An update for ntp is now available for Red Hat Enterprise Linux 6.7 Extended Update Support. 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...

ntp: off-path denial of service on authenticated broadcast mode

It was found that when NTP was configured in broadcast mode, a remote attacker could broadcast packets with bad authentication to all clients. The clients, upon receiving the malformed packets, would break the association with the broadcast server, causing them to become out of sync over a longer...

ntp: ntpd switching to interleaved mode with spoofed packets

It was found that an ntpd client could be forced to change from basic client/server mode to the interleaved symmetric mode. A remote attacker could use a spoofed packet that, when processed by an ntpd client, would cause that client to reject all future legitimate server responses, effectively...