The read_network_packet function in ntp_io.c in ntpd in NTP 4.x before 4.2.8p1 on Linux and OS X does not properly determine whether a source IP address is an IPv6 loopback address, which makes it easier for remote attackers to spoof restricted packets, and read or write to the runtime state, by leveraging the ability to reach the ntpd machine's network interface with a packet from the ::1 address.

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-3388-1 ntp security update
EUVD EUVD EUVD-2014-9557 The read_network_packet function in ntp_io.c in ntpd in NTP 4.x before 4.2.8p1 on Linux and OS X does not properly determine whether a source IP address is an IPv6 loopback address, which makes it easier for remote attackers to spoof restricted packets, and read or write to the runtime state, by leveraging the ability to reach the ntpd machine's network interface with a packet from the ::1 address.
Fixes

Solution

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-06T13:55:04.656Z

Reserved: 2015-10-04T00:00:00.000Z

Link: CVE-2014-9751

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2015-10-06T01:59:02.610

Modified: 2025-04-12T10:46:40.837

Link: CVE-2014-9751

cve-icon Redhat

Severity : Moderate

Publid Date: 2015-02-04T00:00:00Z

Links: CVE-2014-9751 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses