CVE-2021-3468

{"containers": {"cna": {"affected": [{"product": "avahi", "vendor": "n/a", "versions": [{"status": "affected", "version": "All avahi versions 0.6 up to 0.8"}]}], "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-835", "description": "CWE-835", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2023-06-22T00:06:10.695Z", "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1939614"}, {"name": "[debian-lts-announce] 20220607 [SECURITY] [DLA 3047-1] avahi security update", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2023/06/msg00028.html"}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T16:53:17.602Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1939614"}, {"name": "[debian-lts-announce] 20220607 [SECURITY] [DLA 3047-1] avahi security update", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2023/06/msg00028.html", "tags": ["x_transferred"]}]}]}, "cveMetadata": {"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "cveId": "CVE-2021-3468", "datePublished": "2021-06-02T15:09:21.000Z", "dateReserved": "2021-03-26T00:00:00.000Z", "dateUpdated": "2025-02-13T16:28:23.614Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "avahi", "vendor": "n/a", "versions": [{"status": "affected", "version": "All avahi versions 0.6 up to 0.8"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:*", "matchCriteriaId": "1A5E35AD-158F-4E70-8C3A-3E27BF3406F4", "versionEndIncluding": "0.8", "versionStartIncluding": "0.6", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Se ha encontrado un fallo en avahi en versiones 0.6 hasta 0.8. El evento usado para se\u00f1alar la terminaci\u00f3n de la conexi\u00f3n del cliente en el socket Unix de avahi no se maneja correctamente en la funci\u00f3n client_work, permitiendo a un atacante local desencadenar un bucle infinito. La mayor amenaza de esta vulnerabilidad es la disponibilidad del servicio avahi, que deja de responder despu\u00e9s de que este fallo es activado"}], "id": "CVE-2021-3468", "lastModified": "2026-06-17T04:05:09.557", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 2.1, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-06-02T16:15:08.960", "references": [{"source": "secalert@redhat.com", "tags": ["Issue Tracking"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1939614"}, {"source": "secalert@redhat.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html"}, {"source": "secalert@redhat.com", "url": "https://lists.debian.org/debian-lts-announce/2023/06/msg00028.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1939614"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2023/06/msg00028.html"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-835"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-835"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2023:7836", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "avahi-0:0.7-21.el8_9.1", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-12-14T00:00:00Z"}, {"advisory": "RHSA-2023:7836", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "avahi-0:0.7-21.el8_9.1", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-12-14T00:00:00Z"}, {"advisory": "RHSA-2024:0418", "cpe": "cpe:/a:redhat:rhel_eus:8.6", "package": "avahi-0:0.7-20.el8_6.3", "product_name": "Red Hat Enterprise Linux 8.6 Extended Update Support", "release_date": "2024-01-25T00:00:00Z"}, {"advisory": "RHSA-2024:0576", "cpe": "cpe:/a:redhat:rhel_eus:8.8", "package": "avahi-0:0.7-20.el8_8.4", "product_name": "Red Hat Enterprise Linux 8.8 Extended Update Support", "release_date": "2024-01-30T00:00:00Z"}, {"advisory": "RHSA-2023:6707", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "avahi-0:0.8-15.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}, {"advisory": "RHSA-2023:6707", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "avahi-0:0.8-15.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}], "bugzilla": {"description": "avahi: Local DoS by event-busy-loop from writing long lines to /run/avahi-daemon/socket", "id": "1939614", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1939614"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-835", "details": ["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.", "A flaw was found in avahi. 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."], "name": "CVE-2021-3468", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "avahi", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "avahi", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2021-03-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-3468\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-3468"], "threat_severity": "Moderate"}

{}