{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-3468 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-3468 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 2 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-3468 and fix it if it is affected.\n\nWhat it is: CVE-2021-3468 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 2 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-3468 in the wild and no public exploit code.\n\nAffected product: Debian Debian 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-2021-3468/ (Markdown: https://insights.sbomify.com/CVE-2021-3468/index.md)","id":"CVE-2021-3468","markdown":"https://insights.sbomify.com/CVE-2021-3468/index.md","name":"CVE-2021-3468","record":{"aliases":["ALPINE-CVE-2021-3468","AZL-34548","AZL-6324","DEBIAN-CVE-2021-3468","DLA-3466-1","GHSA-43rm-fv4g-cmj8","MGASA-2021-0212","OESA-2021-1232","SUSE-SU-2021:1493-1","SUSE-SU-2021:1493-2","SUSE-SU-2021:1494-1","SUSE-SU-2021:1494-2","UBUNTU-CVE-2021-3468","USN-5008-2","openSUSE-SU-2021:0694-1"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Avahi mDNS responder","requires_auth":"low_privilege","summary":"A local attacker can trigger an infinite loop in Avahi by mishandling client connection termination, causing the service to become unresponsive.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"avahi","vendor":"avahi"},{"product":"debian_linux","vendor":"debian"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-835","name":"Loop with Unreachable Exit Condition"}],"description":"A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered.","ecosystems":["SUSE:Enterprise Storage 6","SUSE:HPE Helion OpenStack 8","SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS","SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS","SUSE:Linux Enterprise Module for Basesystem 15 SP2","SUSE:Linux Enterprise Module for Basesystem 15 SP3","SUSE:Linux Enterprise Module for Desktop Applications 15 SP2","SUSE:Linux Enterprise Module for Desktop Applications 15 SP3","SUSE:Linux Enterprise Module for Package Hub 15 SP2","SUSE:Linux Enterprise Module for Package Hub 15 SP3","SUSE:Linux Enterprise Server 12 SP2-BCL","SUSE:Linux Enterprise Server 12 SP3-BCL","SUSE:Linux Enterprise Server 12 SP3-LTSS","SUSE:Linux Enterprise Server 12 SP4-LTSS","SUSE:Linux Enterprise Server 12 SP5","SUSE:Linux Enterprise Server 15 SP1-BCL","SUSE:Linux Enterprise Server 15 SP1-LTSS","SUSE:Linux Enterprise Server for SAP Applications 12 SP3","SUSE:Linux Enterprise Server for SAP Applications 12 SP4","SUSE:Linux Enterprise Server for SAP Applications 12 SP5","SUSE:Linux Enterprise Server for SAP Applications 15 SP1","SUSE:Linux Enterprise Software Development Kit 12 SP5","SUSE:Linux Enterprise Workstation Extension 12 SP5","SUSE:Manager Proxy 4.0","SUSE:Manager Retail Branch Server 4.0","SUSE:Manager Server 4.0","SUSE:OpenStack Cloud 8","SUSE:OpenStack Cloud 9","SUSE:OpenStack Cloud Crowbar 8","SUSE:OpenStack Cloud Crowbar 9","openSUSE:Leap 15.2"],"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 avahi","id":"CVE-2021-3468","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux"],"type":"denial_of_service","year":"2021"},"n_packages":61,"n_references":3,"next":{"headline":"Missing authorization in Foreman","id":"CVE-2021-3469"},"packages":[{"ecosystem":"SUSE:Enterprise Storage 6","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Enterprise%20Storage%206","source":"SUSE-SU-2021:1493-2"},{"ecosystem":"SUSE:Enterprise Storage 6","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Enterprise%20Storage%206","source":"SUSE-SU-2021:1493-2"},{"ecosystem":"SUSE:HPE Helion OpenStack 8","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=HPE%20Helion%20OpenStack%208","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:HPE Helion OpenStack 8","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=HPE%20Helion%20OpenStack%208","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS","source":"SUSE-SU-2021:1493-2"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS","source":"SUSE-SU-2021:1493-2"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS","source":"SUSE-SU-2021:1493-2"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS","source":"SUSE-SU-2021:1493-2"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP2","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2","source":"SUSE-SU-2021:1493-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP2","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2","source":"SUSE-SU-2021:1493-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP3","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3","source":"SUSE-SU-2021:1493-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP3","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3","source":"SUSE-SU-2021:1493-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Desktop Applications 15 SP2","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP2","source":"SUSE-SU-2021:1493-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Desktop Applications 15 SP2","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP2","source":"SUSE-SU-2021:1493-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Desktop Applications 15 SP3","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP3","source":"SUSE-SU-2021:1493-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Desktop Applications 15 SP3","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP3","source":"SUSE-SU-2021:1493-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Package Hub 15 SP2","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP2","source":"SUSE-SU-2021:1493-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Package Hub 15 SP3","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP3","source":"SUSE-SU-2021:1493-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP2-BCL","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP2-BCL","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP3-BCL","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP3-BCL","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP3-LTSS","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP3-LTSS","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP4-LTSS","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP4-LTSS","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2021:1494-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2021:1494-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP1-BCL","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL","source":"SUSE-SU-2021:1493-2"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP1-BCL","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL","source":"SUSE-SU-2021:1493-2"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP1-LTSS","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS","source":"SUSE-SU-2021:1493-2"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP1-LTSS","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS","source":"SUSE-SU-2021:1493-2"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP3","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP3","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP4","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP4","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4","source":"SUSE-SU-2021:1494-2"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2021:1494-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["0.6.32-32.15.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2021:1494-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP1","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi","purl":"pkg:rpm/suse/avahi\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1","source":"SUSE-SU-2021:1493-2"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP1","fixed":["0.7-3.9.1"],"introduced":["0"],"last_affected":[],"package":"avahi-glib2","purl":"pkg:rpm/suse/avahi-glib2\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1","source":"SUSE-SU-2021:1493-2"}],"prev":{"headline":"Null dereference in jasper","id":"CVE-2021-3467"},"products":["avahi"],"published":"2021-06-02","related":[{"cvss_score":9.1,"headline":"Denial of service in n/a","id":"CVE-2017-6519","kev_date_added":null,"published":"2017-05-01"},{"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":"SUSE","prefix":"SUSE"},{"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":"2025-02-13","vendors":["n/a"]},"summary":"A local attacker can trigger an infinite loop in Avahi by mishandling client connection termination, causing the service to become unresponsive.","url":"https://insights.sbomify.com/CVE-2021-3468/"}