Vulnerability-Lookup

UBUNTU-CVE-2016-1549 (CVE-2016-1549)

Vulnerability from osv_ubuntu – Published: 2017-01-06 21:59 – Updated: 2025-10-24 04:45 – Source website

Details

A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock selection algorithm in ntpd in NTP 4.2.8p4 and earlier and NTPsec 3e160db8dc248a0bcb053b56a80167dc742d2b74 and a5fb34b9cc89b92a8fef2f459004865c93bb7f92 and modify a victim's clock.

Severity

6.5 (Medium)


                    
                      CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

N/A (UNKNOWN)


                    
                      negligible

References

URL

Type

	https://ubuntu.com/security/CVE-2016-1549	REPORT
	http://support.ntp.org/bin/view/Main/SecurityNoti…	REPORT
	http://www.talosintel.com/reports/TALOS-2016-0083/	REPORT
	https://www.cve.org/CVERecord?id=CVE-2016-1549	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ntp",
            "binary_version": "1:4.2.6.p5+dfsg-3ubuntu2.14.04.13+esm1"
          },
          {
            "binary_name": "ntpdate",
            "binary_version": "1:4.2.6.p5+dfsg-3ubuntu2.14.04.13+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "ntp",
        "purl": "pkg:deb/ubuntu/ntp@1:4.2.6.p5+dfsg-3ubuntu2.14.04.13+esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:4.2.6.p5+dfsg-3ubuntu2",
        "1:4.2.6.p5+dfsg-3ubuntu2.14.04.1",
        "1:4.2.6.p5+dfsg-3ubuntu2.14.04.2",
        "1:4.2.6.p5+dfsg-3ubuntu2.14.04.3",
        "1:4.2.6.p5+dfsg-3ubuntu2.14.04.5",
        "1:4.2.6.p5+dfsg-3ubuntu2.14.04.6",
        "1:4.2.6.p5+dfsg-3ubuntu2.14.04.7",
        "1:4.2.6.p5+dfsg-3ubuntu2.14.04.8",
        "1:4.2.6.p5+dfsg-3ubuntu2.14.04.10",
        "1:4.2.6.p5+dfsg-3ubuntu2.14.04.11",
        "1:4.2.6.p5+dfsg-3ubuntu2.14.04.12",
        "1:4.2.6.p5+dfsg-3ubuntu2.14.04.13",
        "1:4.2.6.p5+dfsg-3ubuntu2.14.04.13+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ntp",
            "binary_version": "1:4.2.8p4+dfsg-3ubuntu5.10"
          },
          {
            "binary_name": "ntpdate",
            "binary_version": "1:4.2.8p4+dfsg-3ubuntu5.10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "ntp",
        "purl": "pkg:deb/ubuntu/ntp@1:4.2.8p4+dfsg-3ubuntu5.10?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:4.2.6.p5+dfsg-3ubuntu8",
        "1:4.2.6.p5+dfsg-3ubuntu8.1",
        "1:4.2.6.p5+dfsg-3ubuntu9",
        "1:4.2.8p4+dfsg-3ubuntu1",
        "1:4.2.8p4+dfsg-3ubuntu2",
        "1:4.2.8p4+dfsg-3ubuntu3",
        "1:4.2.8p4+dfsg-3ubuntu4",
        "1:4.2.8p4+dfsg-3ubuntu5",
        "1:4.2.8p4+dfsg-3ubuntu5.1",
        "1:4.2.8p4+dfsg-3ubuntu5.2",
        "1:4.2.8p4+dfsg-3ubuntu5.3",
        "1:4.2.8p4+dfsg-3ubuntu5.4",
        "1:4.2.8p4+dfsg-3ubuntu5.5",
        "1:4.2.8p4+dfsg-3ubuntu5.6",
        "1:4.2.8p4+dfsg-3ubuntu5.7",
        "1:4.2.8p4+dfsg-3ubuntu5.8",
        "1:4.2.8p4+dfsg-3ubuntu5.9",
        "1:4.2.8p4+dfsg-3ubuntu5.10"
      ]
    }
  ],
  "aliases": [],
  "details": "A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock selection algorithm in ntpd in NTP 4.2.8p4 and earlier and NTPsec 3e160db8dc248a0bcb053b56a80167dc742d2b74 and a5fb34b9cc89b92a8fef2f459004865c93bb7f92 and modify a victim\u0027s clock.",
  "id": "UBUNTU-CVE-2016-1549",
  "modified": "2025-10-24T04:45:35Z",
  "published": "2017-01-06T21:59:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-1549"
    },
    {
      "type": "REPORT",
      "url": "http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security"
    },
    {
      "type": "REPORT",
      "url": "http://www.talosintel.com/reports/TALOS-2016-0083/"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2016-1549"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "negligible",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2016-1549"
  ]
}

CVE-2016-1549 (GCVE-0-2016-1549)

Vulnerability from cvelistv5 – Published: 2017-01-06 21:00 – Updated: 2024-08-05 23:02

Summary

Severity

No CVSS data available.

CWE

unspecified

Assigner

certcc mitre root

References

9 references

URL	Tags
http://www.talosintelligence.com/reports/TALOS-20…	x_refsource_MISC
http://www.securityfocus.com/bid/88200	vdb-entryx_refsource_BID
http://www.securitytracker.com/id/1035705	vdb-entryx_refsource_SECTRACK
http://www.oracle.com/technetwork/topics/security…	x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2017100…	x_refsource_CONFIRM
https://security.FreeBSD.org/advisories/FreeBSD-S…	vendor-advisoryx_refsource_FREEBSD
https://www.synology.com/support/security/Synolog…	x_refsource_CONFIRM
https://security.gentoo.org/glsa/201607-15	vendor-advisoryx_refsource_GENTOO
https://support.hpe.com/hpsc/doc/public/display?d…	x_refsource_CONFIRM

Impacted products

2 products

Vendor	Product	Version
NTP Project	NTP	Affected: 4.2.8p3 Affected: 4.2.8p4
NTPsec Project	NTPSec	Affected: 3e160db8dc248a0bcb053b56a80167dc742d2b74 Affected: a5fb34b9cc89b92a8fef2f459004865c93bb7f92

Date Public

2016-04-26 00:00

Show details on NVD website

JSON

To clipboard

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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.