{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2017-6519 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2017-6519 is a critical denial of service vulnerability in Canonical Ubuntu Linux, published on 1 May 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-2017-6519 and fix it if it is affected.\n\nWhat it is: CVE-2017-6519 is a critical denial of service vulnerability in Canonical Ubuntu Linux, published on 1 May 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-2017-6519 in the wild and no public exploit code.\n\nAffected product: Canonical Ubuntu Linux. 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-2017-6519/ (Markdown: https://insights.sbomify.com/CVE-2017-6519/index.md)","id":"CVE-2017-6519","markdown":"https://insights.sbomify.com/CVE-2017-6519/index.md","name":"CVE-2017-6519","record":{"aliases":["ALPINE-CVE-2017-6519","AZL-6322","CVE-2018-1000845","DEBIAN-CVE-2017-6519","GHSA-6vpj-pr2c-5mm2","MGASA-2019-0081","RHSA-2020:1176","UBUNTU-CVE-2017-6519"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Avahi mDNS responder","requires_auth":"none","summary":"Remote attackers can cause denial of service via traffic amplification and potentially leak sensitive information from Avahi mDNS responders.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"avahi","vendor":"avahi"},{"product":"ubuntu_linux","vendor":"canonical"}],"cvss":{"score":9.1,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-346","name":"Origin Validation Error"}],"description":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive  information from the responding device via port-5353 UDP packets.  NOTE: this may overlap CVE-2015-2809.","ecosystems":["Red Hat:enterprise_linux:7::client","Red Hat:enterprise_linux:7::computenode","Red Hat:enterprise_linux:7::server","Red Hat:enterprise_linux:7::workstation"],"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 n/a","id":"CVE-2017-6519","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux"],"type":"denial_of_service","year":"2017"},"n_packages":92,"n_references":7,"next":{"headline":"Denial of service in n/a","id":"CVE-2017-6520"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/redhat/avahi","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-autoipd","purl":"pkg:rpm/redhat/avahi-autoipd","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-compat-howl","purl":"pkg:rpm/redhat/avahi-compat-howl","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-compat-howl-devel","purl":"pkg:rpm/redhat/avahi-compat-howl-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-compat-libdns_sd","purl":"pkg:rpm/redhat/avahi-compat-libdns_sd","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-compat-libdns_sd-devel","purl":"pkg:rpm/redhat/avahi-compat-libdns_sd-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-debuginfo","purl":"pkg:rpm/redhat/avahi-debuginfo","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-devel","purl":"pkg:rpm/redhat/avahi-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-dnsconfd","purl":"pkg:rpm/redhat/avahi-dnsconfd","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-glib","purl":"pkg:rpm/redhat/avahi-glib","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-glib-devel","purl":"pkg:rpm/redhat/avahi-glib-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-gobject","purl":"pkg:rpm/redhat/avahi-gobject","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-gobject-devel","purl":"pkg:rpm/redhat/avahi-gobject-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-libs","purl":"pkg:rpm/redhat/avahi-libs","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-qt3","purl":"pkg:rpm/redhat/avahi-qt3","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-qt3-devel","purl":"pkg:rpm/redhat/avahi-qt3-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-qt4","purl":"pkg:rpm/redhat/avahi-qt4","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-qt4-devel","purl":"pkg:rpm/redhat/avahi-qt4-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-tools","purl":"pkg:rpm/redhat/avahi-tools","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-ui","purl":"pkg:rpm/redhat/avahi-ui","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-ui-devel","purl":"pkg:rpm/redhat/avahi-ui-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-ui-gtk3","purl":"pkg:rpm/redhat/avahi-ui-gtk3","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-ui-tools","purl":"pkg:rpm/redhat/avahi-ui-tools","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/redhat/avahi","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-autoipd","purl":"pkg:rpm/redhat/avahi-autoipd","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-compat-howl","purl":"pkg:rpm/redhat/avahi-compat-howl","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-compat-howl-devel","purl":"pkg:rpm/redhat/avahi-compat-howl-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-compat-libdns_sd","purl":"pkg:rpm/redhat/avahi-compat-libdns_sd","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-compat-libdns_sd-devel","purl":"pkg:rpm/redhat/avahi-compat-libdns_sd-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-debuginfo","purl":"pkg:rpm/redhat/avahi-debuginfo","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-devel","purl":"pkg:rpm/redhat/avahi-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-dnsconfd","purl":"pkg:rpm/redhat/avahi-dnsconfd","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-glib","purl":"pkg:rpm/redhat/avahi-glib","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-glib-devel","purl":"pkg:rpm/redhat/avahi-glib-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-gobject","purl":"pkg:rpm/redhat/avahi-gobject","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-gobject-devel","purl":"pkg:rpm/redhat/avahi-gobject-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-libs","purl":"pkg:rpm/redhat/avahi-libs","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-qt3","purl":"pkg:rpm/redhat/avahi-qt3","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-qt3-devel","purl":"pkg:rpm/redhat/avahi-qt3-devel","source":"RHSA-2020:1176"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:0.6.31-20.el7"],"introduced":["0"],"last_affected":[],"package":"avahi-qt4","purl":"pkg:rpm/redhat/avahi-qt4","source":"RHSA-2020:1176"}],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2017-6518"},"products":["n/a"],"published":"2017-05-01","related":[{"cvss_score":7.8,"headline":"Path traversal in n/a","id":"CVE-2021-26720","kev_date_added":null,"published":"2021-02-17"},{"cvss_score":6.5,"headline":"Avahi has Uncontrolled Recursion in lookup_handle_cname function","id":"CVE-2026-24401","kev_date_added":null,"published":"2026-01-24"},{"cvss_score":6.5,"headline":"Avahi has a reachable assertion in lookup_multicast_callback","id":"CVE-2025-68468","kev_date_added":null,"published":"2026-01-12"},{"cvss_score":6.5,"headline":"Avahi has a reachable assertion in lookup_start","id":"CVE-2025-68471","kev_date_added":null,"published":"2026-01-12"},{"cvss_score":6.2,"headline":"Reachable assertion in avahi_dns_packet_append_record","id":"CVE-2023-38469","kev_date_added":null,"published":"2023-11-02"},{"cvss_score":6.2,"headline":"Reachable assertion in avahi_escape_label","id":"CVE-2023-38470","kev_date_added":null,"published":"2023-11-02"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-12-03","vendors":["n/a"]},"summary":"Remote attackers can cause denial of service via traffic amplification and potentially leak sensitive information from Avahi mDNS responders.","url":"https://insights.sbomify.com/CVE-2017-6519/"}