CVE-2016-4956

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Summary

CVECVE-2016-4956
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-07-05 01:59:03 UTC
Updated2026-05-06 22:30:45 UTC
Descriptionntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (interleaved-mode transition and time change) via a spoofed broadcast packet. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-1548.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Problem Types: NVD-CWE-noinfo | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Ntp Ntp All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
[security-announce] SUSE-SU-2016:1563-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
[SECURITY] Fedora 24 Update: ntp-4.2.6p5-41.fc24 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
SecurityFocus af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
[security-announce] SUSE-SU-2016:1912-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
[security-announce] SUSE-SU-2016:1568-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc af854a3a-2127-422b-91ae-364da2661108 security.FreeBSD.org Third Party Advisory
NTP CVE-2016-4956 Incomplete Fix Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, VDB Entry
Bug 3042 – Broadcast interleave af854a3a-2127-422b-91ae-364da2661108 bugs.ntp.org Issue Tracking, Vendor Advisory
support.ntp.org/bin/view/Main/NtpBug3042 af854a3a-2127-422b-91ae-364da2661108 support.ntp.org Vendor Advisory
Vulnerability Note VU#321640 - NTP.org ntpd is vulnerable to denial of service and other vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.kb.cert.org
Slackware Security Advisory - ntp Updates ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com
Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: June 2016 af854a3a-2127-422b-91ae-364da2661108 tools.cisco.com
[security-announce] SUSE-SU-2016:1584-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
[security-announce] SUSE-SU-2016:1602-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
SecurityFocus af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf af854a3a-2127-422b-91ae-364da2661108 cert-portal.siemens.com Third Party Advisory
Document Display | HPE Support Center af854a3a-2127-422b-91ae-364da2661108 h20566.www2.hpe.com Third Party Advisory
NTP: Multiple vulnerabilities (GLSA 201607-15) — Gentoo Security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
SecurityFocus af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Vulnerability Note VU#321640 - NTP.org ntpd is vulnerable to denial of service and other vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.kb.cert.org Third Party Advisory, US Government Resource
support.ntp.org/bin/view/Main/SecurityNotice af854a3a-2127-422b-91ae-364da2661108 support.ntp.org Release Notes, Vendor Advisory
SecurityFocus af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
[security-announce] SUSE-SU-2016:2094-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
ntp Multiple Bugs Let Remote Users Modify Parameters and Deny Service - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com Third Party Advisory, VDB Entry
[SECURITY] Fedora 22 Update: ntp-4.2.6p5-41.fc22 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[security-announce] openSUSE-SU-2016:1636-1: important: Security update af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
USN-3096-1: NTP vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com
[SECURITY] Fedora 23 Update: ntp-4.2.6p5-41.fc23 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
SecurityFocus af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
[security-announce] openSUSE-SU-2016:1583-1: important: Security update af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
SecurityFocus af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Siemens SIMATIC NET CP 443-1 OPC UA | CISA af854a3a-2127-422b-91ae-364da2661108 us-cert.cisa.gov
Oracle Solaris Bulletin - April 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
[SECURITY] Fedora 24 Update: ntp-4.2.6p5-41.fc24 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 23 Update: ntp-4.2.6p5-41.fc23 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 22 Update: ntp-4.2.6p5-41.fc22 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 590736 Siemens SIMATIC NET CP 443-1 OPC UA Multiple Vulnerabilities (ICSA-21-159-11)
  • 690292 Free Berkeley Software Distribution (FreeBSD) Security Update for FreeBSD (7cfcea05-600a-11e6-a6c3-14dae9d210b8)
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