PT-2016-7323 · Ntf+5 · Ntp+6

Matthew Van Gundy · Published 2016-11-23 · Updated 2024-06-15 · CVE-2016-7427

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions NTP versions prior to 4.2.8p9

Description The issue allows remote attackers to cause a denial of service (reject broadcast mode packets) via a crafted broadcast mode packet. It is also caused by a NULL pointer dereference when trap service has been enabled, allowing a remote attacker to exploit this vulnerability to cause the application to crash. Multiple vulnerabilities could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or modify the time being advertised by a device acting as a Network Time Protocol (NTP) server.

Recommendations For NTP versions prior to 4.2.8p9, update to version 4.2.8p9 or later to resolve the issue. As a temporary workaround, consider disabling the trap service to minimize the risk of exploitation. Restrict access to the broadcast mode to prevent crafted packets from causing a denial of service.

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2016-7427

OPENSUSE-SU-2024:10181-1

SUSE-SU-2016:3193-1

SUSE-SU-2016:3195-1

SUSE-SU-2016:3196-1

SUSE-SU-2017:0255-1

USN-3349-1

USN-3707-2

Affected Products

Cisco Ios Xr

Cisco Nexus

Freebsd

Ibm Aix

Ntp

Suse

Ubuntu

References · 125

• https://ubuntu.com/security/notices/USN-3349-1 · Vendor Advisory
• http://nwtime.org/ntp428p9_release · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-6462 · Vendor Advisory
• http://support.ntp.org/bin/view/Main/NtpBug3114 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-2519 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-6460 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-7429 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-7428 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2016-7427 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-9310 · Vendor Advisory
• https://usn.ubuntu.com/3707-2 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2016:3195-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2016-7427 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2016-7427 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2017:0255-1 · Vendor Advisory