PT-2016-7327 · Cisco+6 · Ntp+7

Aanchal Malhotra + 2 · Published 2016-11-23 · Updated 2024-06-15 · CVE-2016-7433

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/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 is related to the initial sync calculations in NTP, which could allow remote attackers to have an unspecified impact via unknown vectors. This is due to a "root distance that did not include the peer dispersion." Multiple vulnerabilities in the NTP daemon package 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 an 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 restricting access to NTP services to minimize the risk of exploitation. Additionally, workarounds may be available and are documented in the Cisco bug for each affected product.

Fix

DoS

Weakness Enumeration

CWE-682

Related Identifiers

ALT-PU-2017-2335

CESA-2017_0252

CVE-2016-7433

OPENSUSE-SU-2024:10181-1

RHSA-2017:0252

RHSA-2017_0252

SUSE-SU-2016:3193-1

SUSE-SU-2016:3195-1

SUSE-SU-2016:3196-1

SUSE-SU-2017:0255-1

USN-3349-1

Affected Products

Alt Linux

Centos

Cisco Nexus

Freebsd

Ntp

Red Hat

Suse

Ubuntu

References · 136

• https://ubuntu.com/security/notices/USN-3349-1 · Vendor Advisory
• http://nwtime.org/ntp428p9_release · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2016-7433 · Security Note
• 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://osv.dev/vulnerability/SUSE-SU-2017:0255-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-6458 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMSYVQMMF37MANYEO7KBHOPSC74EKGN · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-7426 · Vendor Advisory
• https://security.freebsd.org/advisories/FreeBSD-SA-16:39.ntp.asc · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U5E3XBBCK5IXOLDAH2E4M3QKIYIHUMMP · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-6464 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2016-7433 · Vendor Advisory
• http://rhn.redhat.com/errata/RHSA-2017-0252.html · Vendor Advisory