{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2015-1853 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2015-1853 is a medium-severity denial of service vulnerability in chrony, published on 9 Dec 2019. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2015-1853 and fix it if it is affected.\n\nWhat it is: CVE-2015-1853 is a medium-severity denial of service vulnerability in chrony, published on 9 Dec 2019. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2015-1853 in the wild and no public exploit code.\n\nAffected product: chrony. 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-2015-1853/ (Markdown: https://insights.sbomify.com/CVE-2015-1853/index.md)","id":"CVE-2015-1853","markdown":"https://insights.sbomify.com/CVE-2015-1853/index.md","name":"CVE-2015-1853","record":{"aliases":["DEBIAN-CVE-2015-1853","GHSA-gf8j-j7q8-vhh5","UBUNTU-CVE-2015-1853"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"NTP time synchronization","requires_auth":"low_privilege","summary":"Remote attackers can cause denial of service in chrony NTP servers by sending crafted packets with random timestamps, preventing time synchronization.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"chrony","vendor":"tuxfamily"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[],"description":"chrony before 1.31.1 does not properly protect state variables in authenticated symmetric NTP associations, which allows remote attackers with knowledge of NTP peering to cause a denial of service (inability to synchronize) via random timestamps in crafted NTP data packets.","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 chrony","id":"CVE-2015-1853","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2015"},"n_packages":0,"n_references":2,"next":{"headline":"Missing authorization in n/a","id":"CVE-2015-1854"},"packages":[],"prev":{"headline":"OpenStack keystonemiddleware and python-keystoneclient vulnerable to man-in-the-middle attacks","id":"CVE-2015-1852"},"products":["chrony"],"published":"2019-12-09","related":[{"cvss_score":8.1,"headline":"Auth bypass in n/a","id":"CVE-2016-1567","kev_date_added":null,"published":"2016-01-26"},{"cvss_score":5,"headline":"Integer overflow in n/a","id":"CVE-2012-4502","kev_date_added":null,"published":"2013-11-05"},{"cvss_score":5,"headline":"Information disclosure in n/a","id":"CVE-2012-4503","kev_date_added":null,"published":"2013-11-05"},{"cvss_score":5,"headline":"Denial of service in n/a","id":"CVE-2010-0292","kev_date_added":null,"published":"2010-02-08"},{"cvss_score":5,"headline":"Denial of service in n/a","id":"CVE-2010-0293","kev_date_added":null,"published":"2010-02-08"},{"cvss_score":5,"headline":"Denial of service in n/a","id":"CVE-2010-0294","kev_date_added":null,"published":"2010-02-08"}],"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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-06","vendors":["chrony"]},"summary":"Remote attackers can cause denial of service in chrony NTP servers by sending crafted packets with random timestamps, preventing time synchronization.","url":"https://insights.sbomify.com/CVE-2015-1853/"}