Vulnerability Details : CVE-2016-4956
ntpd 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.
Vulnerability category: Denial of service
Products affected by CVE-2016-4956
- cpe:2.3:o:novell:suse_manager:2.1:*:*:*:*:*:*:*
- cpe:2.3:o:suse:linux_enterprise_desktop:12:sp1:*:*:*:*:*:*
- cpe:2.3:o:suse:linux_enterprise_server:11:sp2:*:*:ltss:*:*:*
- cpe:2.3:o:suse:linux_enterprise_server:12:sp1:*:*:*:*:*:*
- cpe:2.3:o:suse:linux_enterprise_server:11:sp4:*:*:*:*:*:*
- cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:ltss:*:*:*
- cpe:2.3:a:suse:openstack_cloud:5:*:*:*:*:*:*:*
- cpe:2.3:a:suse:manager_proxy:2.1:*:*:*:*:*:*:*
- cpe:2.3:o:oracle:solaris:10:*:*:*:*:*:*:*
- cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_net_cp_443-1_opc_ua_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:-:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p2-rc1:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p1:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p2:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p1-beta1:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p1-beta2:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p1-beta3:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p1-beta4:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p1-beta5:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p1-rc1:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p1-rc2:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p2-rc2:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p2-rc3:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p3:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p3-rc1:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p3-rc2:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p3-rc3:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p4:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p5:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p6:*:*:*:*:*:*
- cpe:2.3:a:ntp:ntp:4.2.8:p7:*:*:*:*:*:*
- cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2016-4956
3.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 85 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2016-4956
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
3.9
|
1.4
|
NIST |
References for CVE-2016-4956
-
http://www.kb.cert.org/vuls/id/321640
VU#321640 - NTP.org ntpd is vulnerable to denial of service and other vulnerabilitiesThird Party Advisory;US Government Resource
-
http://bugs.ntp.org/3042
Issue Tracking;Vendor Advisory
-
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd
Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: June 2016
-
http://www.securityfocus.com/bid/91009
NTP CVE-2016-4956 Incomplete Fix Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
http://www.securityfocus.com/archive/1/archive/1/540683/100/0/threaded
-
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html
[security-announce] openSUSE-SU-2016:1583-1: important: Security updateMailing List;Third Party Advisory
-
http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded
-
http://support.ntp.org/bin/view/Main/SecurityNotice
SecurityNotice < Main < NTPRelease Notes;Vendor Advisory
-
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03757en_us
HPESBHF03757 rev.1 - HPE Network Products including Comware 5 and Comware 7 running NTP, Remote Denial of Service (DoS)Third Party Advisory
-
https://security.gentoo.org/glsa/201607-15
NTP: Multiple vulnerabilities (GLSA 201607-15) — Gentoo securityThird Party Advisory
-
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc
Third Party Advisory
-
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
Oracle Solaris Bulletin - April 2016Third Party Advisory
-
http://www.securityfocus.com/archive/1/538599/100/0/threaded
-
https://www.kb.cert.org/vuls/id/321640
VU#321640 - NTP.org ntpd is vulnerable to denial of service and other vulnerabilities
-
http://www.securityfocus.com/archive/1/540683/100/0/threaded
-
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html
[security-announce] SUSE-SU-2016:1568-1: important: Security update for ntp - openSUSE Security Announce - openSUSE Mailing Lists
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/
[SECURITY] Fedora 24 Update: ntp-4.2.6p5-41.fc24 - package-announce - Fedora Mailing-Lists
-
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
[security-announce] SUSE-SU-2016:1912-1: important: Security update for
-
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
[security-announce] SUSE-SU-2016:2094-1: important: Security update for
-
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html
[security-announce] SUSE-SU-2016:1584-1: important: Security update forMailing List;Third Party Advisory
-
http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html
Slackware Security Advisory - ntp Updates ≈ Packet Storm
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2/
[SECURITY] Fedora 22 Update: ntp-4.2.6p5-41.fc22 - package-announce - Fedora Mailing-Lists
-
http://support.ntp.org/bin/view/Main/NtpBug3042
NtpBug3042 < Main < NTPVendor Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ORAMN3Q7TVJ54MBYF75XCJOE3DP7LYHT/
[SECURITY] Fedora 23 Update: ntp-4.2.6p5-41.fc23 - package-announce - Fedora Mailing-Lists
-
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html
[security-announce] SUSE-SU-2016:1563-1: important: Security update forMailing List;Third Party Advisory
-
http://www.securityfocus.com/archive/1/538600/100/0/threaded
-
http://www.securitytracker.com/id/1036037
ntp Multiple Bugs Let Remote Users Modify Parameters and Deny Service - SecurityTrackerThird Party Advisory;VDB Entry
-
http://www.ubuntu.com/usn/USN-3096-1
USN-3096-1: NTP vulnerabilities | Ubuntu security notices
-
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html
[security-announce] openSUSE-SU-2016:1636-1: important: Security updateMailing List;Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html
[security-announce] SUSE-SU-2016:1602-1: important: Security update forMailing List;Third Party Advisory
-
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
Siemens SIMATIC NET CP 443-1 OPC UA | CISA
-
http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded
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