CVE-2016-1550
An exploitable vulnerability exists in the message authentication functionality of libntp in ntp 4.2.8p4 and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. An attacker can send a series of crafted
02 Description
An exploitable vulnerability exists in the message authentication functionality of libntp in ntp 4.2.8p4 and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. An attacker can send a series of crafted
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 3.60% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 89.1% of scored records. A rank, not a probability.
- NVD base score
- 5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2017-01-06 21:00Z9 YR AGO
- Last updated
- 2024-08-05 23:02Z2 YR AGO
- Reserved
- 2016-01-07
- Assigning CNA
- certcc
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
- Data version
- 5.1
- Document digest
- f78488d3f3225f349e32bbde0146da18a96ed6f4e216b165233f1191365d9b7a
05 Affected products
06 References
- www.ubuntu.comUSN-3096-1http://www.ubuntu.com/usn/USN-3096-1
- www.debian.orgDSA-3629http://www.debian.org/security/2016/dsa-3629
- www.oracle.comhttp://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- access.redhat.comRHSA-2016:1141https://access.redhat.com/errata/RHSA-2016:1141
- lists.opensuse.orgSUSE-SU-2016:1912http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
- www.kb.cert.orgVU#718152https://www.kb.cert.org/vuls/id/718152
- rhn.redhat.comRHSA-2016:1552http://rhn.redhat.com/errata/RHSA-2016-1552.html
- www.securitytracker.com1035705http://www.securitytracker.com/id/1035705
- www.oracle.comhttp://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20171004-0002/
- www.talosintelligence.comhttp://www.talosintelligence.com/reports/TALOS-2016-0084/
- tools.cisco.com20160428 Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: April 2016http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd
- security.freebsd.orgFreeBSD-SA-16:16https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
- www.securityfocus.com88261http://www.securityfocus.com/bid/88261
- lists.opensuse.orgSUSE-SU-2016:2094http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
- lists.opensuse.orgopenSUSE-SU-2016:1423http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
- security.gentoo.orgGLSA-201607-15https://security.gentoo.org/glsa/201607-15
- lists.opensuse.orgopenSUSE-SU-2016:1329http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html
- packetstormsecurity.comhttp://packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html
- lists.opensuse.orgSUSE-SU-2016:1471http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html
- lists.fedoraproject.orgFEDORA-2016-5b2eb0bf9chttp://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html
- lists.opensuse.orgSUSE-SU-2016:1291http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html
- www.debian.orgDSA-3629https://www.debian.org/security/2016/dsa-3629
- www.talosintelligence.comhttps://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0084
- www.securityfocus.com20160429 [slackware-security] ntp (SSA:2016-120-01)http://www.securityfocus.com/archive/1/538233/100/0/threaded
- lists.opensuse.orgSUSE-SU-2016:1568http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html
- www.securityfocus.com20160429 [slackware-security] ntp (SSA:2016-120-01)http://www.securityfocus.com/archive/1/archive/1/538233/100/0/threaded
- lists.opensuse.orgSUSE-SU-2016:1278http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html
- lists.fedoraproject.orgFEDORA-2016-ed8c6c0426http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
- us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
- us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
- www.arista.comhttps://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19
07 Fixed in
Debian 11
- ntp Fixed in 1:4.2.8p7+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- ntp Fixed in 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- ntp Fixed in 1:4.2.8p4+dfsg-3ubuntu5.3
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.