{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2016-1547 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2016-1547 is a medium-severity denial of service vulnerability in Ntp Ntp, published on 6 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2016-1547 and fix it if it is affected.\n\nWhat it is: CVE-2016-1547 is a medium-severity denial of service vulnerability in Ntp Ntp, published on 6 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2016-1547 in the wild and no public exploit code.\n\nAffected product: Ntp Ntp. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2016-1547/ (Markdown: https://insights.sbomify.com/CVE-2016-1547/index.md)","id":"CVE-2016-1547","markdown":"https://insights.sbomify.com/CVE-2016-1547/index.md","name":"CVE-2016-1547","record":{"aliases":["DEBIAN-CVE-2016-1547","GHSA-hqqw-v32x-33cf","UBUNTU-CVE-2016-1547"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"NTP time server","requires_auth":"none","summary":"An off-path attacker can disrupt NTP client associations by sending spoofed crypto NAK packets, causing denial of service even with authentication enabled.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"certcc","cpe":[{"product":"ntp","vendor":"ntp"}],"cvss":{"score":5.3,"severity":"medium","source":"nvd","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.0"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Denial of service in NTP","id":"CVE-2016-1547","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"ntp:ntp","products":["ntp:ntp"],"type":"denial_of_service","year":"2016"},"n_packages":0,"n_references":15,"next":{"headline":"Other in NTP","id":"CVE-2016-1548"},"packages":[],"prev":{"headline":"Denial of service in n/a","id":"CVE-2016-1546"},"products":["NTP","NTPSec"],"published":"2017-01-06","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2018-12327","kev_date_added":null,"published":"2018-06-20"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2017-6460","kev_date_added":null,"published":"2017-03-27"},{"cvss_score":8.1,"headline":"Other in n/a","id":"CVE-2019-11331","kev_date_added":null,"published":"2019-04-18"},{"cvss_score":7.8,"headline":"Memory corruption in n/a","id":"CVE-2017-6451","kev_date_added":null,"published":"2017-03-27"},{"cvss_score":7.8,"headline":"Memory corruption in n/a","id":"CVE-2017-6452","kev_date_added":null,"published":"2017-03-27"},{"cvss_score":7.8,"headline":"Memory corruption in n/a","id":"CVE-2017-6462","kev_date_added":null,"published":"2017-03-27"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2015-7978","kev_date_added":null,"published":"2017-01-30"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-05","vendors":["NTP Project","NTPsec Project"]},"summary":"An off-path attacker can disrupt NTP client associations by sending spoofed crypto NAK packets, causing denial of service even with authentication enabled.","url":"https://insights.sbomify.com/CVE-2016-1547/"}