CVE-2023-3341

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channel messages sent to `named` calls certain functions recursively during packet parsing. Recursion depth is only limited by the maximum accepted packet size; depending on the environment, this may cause the packet-parsing code to run out of available stack memory, causing `named` to terminate unexpectedly. Since each incoming control channel message is fully parsed before its contents are authenticated, exploiting this flaw does not require the attacker to hold a valid RNDC key; only network access to the control channel's configured TCP port is necessary.\nThis issue affects BIND 9 versions 9.2.0 through 9.16.43, 9.18.0 through 9.18.18, 9.19.0 through 9.19.16, 9.9.3-S1 through 9.16.43-S1, and 9.18.0-S1 through 9.18.18-S1."}, {"lang": "es", "value": "El c\u00f3digo que procesa los mensajes del canal de control enviados a \"named\" llama a ciertas funciones de forma recursiva durante el an\u00e1lisis de paquetes. La profundidad de la recursividad s\u00f3lo est\u00e1 limitada por el tama\u00f1o m\u00e1ximo de paquete aceptado; Dependiendo del entorno, esto puede provocar que el c\u00f3digo de an\u00e1lisis de paquetes se quede sin memoria disponible, lo que provocar\u00e1 que \"named\" finalice inesperadamente. Dado que cada mensaje entrante del canal de control se analiza completamente antes de autenticar su contenido, explotar esta falla no requiere que el atacante tenga una clave RNDC v\u00e1lida; s\u00f3lo es necesario el acceso de red al puerto TCP configurado del canal de control. Este problema afecta a las versiones de BIND 9, 9.2.0 a 9.16.43, 9.18.0 a 9.18.18, 9.19.0 a 9.19.16, 9.9.3-S1 a 9.16.43-S1 y 9.18.0-S1 a 9.18. .18-S1."}], "id": "CVE-2023-3341", "lastModified": "2026-06-17T06:13:51.253", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-officer@isc.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-3341", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-06-03T16:03:26.539822Z", "version": "2.0.3"}}]}, "published": "2023-09-20T13:15:11.770", "references": [{"source": "security-officer@isc.org", "tags": ["Mailing List", "Patch"], "url": "http://www.openwall.com/lists/oss-security/2023/09/20/2"}, {"source": "security-officer@isc.org", "tags": ["Vendor Advisory"], "url": "https://kb.isc.org/docs/cve-2023-3341"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00021.html"}, {"source": "security-officer@isc.org", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IPJLLTJCSDJJII7IIZPLTBQNWP7MZH7F/"}, {"source": "security-officer@isc.org", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U35OARLQCPMVCBBPHWBXY5M6XJLD2TZ5/"}, {"source": "security-officer@isc.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20231013-0003/"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2023/dsa-5504"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "http://www.openwall.com/lists/oss-security/2023/09/20/2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://kb.isc.org/docs/cve-2023-3341"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00021.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IPJLLTJCSDJJII7IIZPLTBQNWP7MZH7F/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U35OARLQCPMVCBBPHWBXY5M6XJLD2TZ5/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20231013-0003/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2023/dsa-5504"}], "sourceIdentifier": "security-officer@isc.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-1325"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2025:0039", "cpe": "cpe:/o:redhat:rhel_els:6", "package": "bind-32:9.8.2-0.68.rc1.el6_10.14", "product_name": "Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION", "release_date": "2025-01-06T00:00:00Z"}, {"advisory": "RHSA-2025:0039", "cpe": "cpe:/o:redhat:rhel_els:6", "package": "bind-dyndb-ldap-0:2.3-8.el6_10.1", "product_name": "Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION", "release_date": "2025-01-06T00:00:00Z"}, {"advisory": "RHSA-2023:5691", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "bind-32:9.11.4-26.P2.el7_9.15", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2023-10-12T00:00:00Z"}, {"advisory": "RHSA-2023:5460", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "bind9.16-32:9.16.23-0.14.el8_8.2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-10-05T00:00:00Z"}, {"advisory": "RHSA-2023:5474", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "bind-32:9.11.36-8.el8_8.2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-10-05T00:00:00Z"}, {"advisory": "RHSA-2023:5474", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "bind-32:9.11.36-8.el8_8.2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-10-05T00:00:00Z"}, {"advisory": "RHSA-2023:5526", "cpe": "cpe:/a:redhat:rhel_e4s:8.1", "package": "bind-32:9.11.4-26.P2.el8_1.8", "product_name": "Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions", "release_date": "2023-10-09T00:00:00Z"}, {"advisory": "RHSA-2023:5527", "cpe": "cpe:/a:redhat:rhel_aus:8.2", "package": "bind-32:9.11.13-6.el8_2.6", "product_name": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "release_date": "2023-10-09T00:00:00Z"}, {"advisory": "RHSA-2023:5527", "cpe": "cpe:/a:redhat:rhel_tus:8.2", "package": "bind-32:9.11.13-6.el8_2.6", "product_name": "Red Hat Enterprise Linux 8.2 Telecommunications Update Service", "release_date": "2023-10-09T00:00:00Z"}, {"advisory": "RHSA-2023:5527", "cpe": "cpe:/a:redhat:rhel_e4s:8.2", "package": "bind-32:9.11.13-6.el8_2.6", "product_name": "Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions", "release_date": "2023-10-09T00:00:00Z"}, {"advisory": "RHSA-2023:5529", "cpe": "cpe:/a:redhat:rhel_aus:8.4", "package": "bind-32:9.11.26-4.el8_4.3", "product_name": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "release_date": "2023-10-09T00:00:00Z"}, {"advisory": "RHSA-2023:5529", "cpe": "cpe:/a:redhat:rhel_tus:8.4", "package": "bind-32:9.11.26-4.el8_4.3", "product_name": "Red Hat Enterprise Linux 8.4 Telecommunications Update Service", "release_date": "2023-10-09T00:00:00Z"}, {"advisory": "RHSA-2023:5529", "cpe": "cpe:/a:redhat:rhel_e4s:8.4", "package": "bind-32:9.11.26-4.el8_4.3", "product_name": "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions", "release_date": "2023-10-09T00:00:00Z"}, {"advisory": "RHSA-2023:5473", "cpe": "cpe:/a:redhat:rhel_eus:8.6", "package": "bind-32:9.11.36-3.el8_6.5", "product_name": "Red Hat Enterprise Linux 8.6 Extended Update Support", "release_date": "2023-10-05T00:00:00Z"}, {"advisory": "RHSA-2023:5771", "cpe": "cpe:/a:redhat:rhel_eus:8.6", "package": "bind9.16-32:9.16.23-0.7.el8_6.3", "product_name": "Red Hat Enterprise Linux 8.6 Extended Update Support", "release_date": "2023-10-17T00:00:00Z"}, {"advisory": "RHSA-2023:5689", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "bind-32:9.16.23-11.el9_2.2", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-10-12T00:00:00Z"}, {"advisory": "RHSA-2023:5690", "cpe": "cpe:/a:redhat:rhel_eus:9.0", "package": "bind-32:9.16.23-1.el9_0.3", "product_name": "Red Hat Enterprise Linux 9.0 Extended Update Support", "release_date": "2023-10-12T00:00:00Z"}], "bugzilla": {"description": "bind: stack exhaustion in control channel code may lead to DoS", "id": "2239621", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2239621"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-20", "details": ["The code that processes control channel messages sent to `named` calls certain functions recursively during packet parsing. Recursion depth is only limited by the maximum accepted packet size; depending on the environment, this may cause the packet-parsing code to run out of available stack memory, causing `named` to terminate unexpectedly. Since each incoming control channel message is fully parsed before its contents are authenticated, exploiting this flaw does not require the attacker to hold a valid RNDC key; only network access to the control channel's configured TCP port is necessary.\nThis issue affects BIND 9 versions 9.2.0 through 9.16.43, 9.18.0 through 9.18.18, 9.19.0 through 9.19.16, 9.9.3-S1 through 9.16.43-S1, and 9.18.0-S1 through 9.18.18-S1.", "A flaw was found in the Bind package. The code that processes control channel messages sent to named calls certain functions recursively during packet parsing. Recursion depth is only limited by the maximum accepted packet size. Depending on the environment, this may cause the packet-parsing code to run out of available stack memory, causing named to terminate unexpectedly."], "mitigation": {"lang": "en:us", "value": "By default, named only allows control-channel connections over the loopback interface, making this attack impossible to carry out over the network. When enabling remote access to the control channel\u2019s configured TCP port, care should be taken to limit such access to trusted IP ranges on the network level, effectively preventing unauthorized parties from carrying out the attack described in this advisory."}, "name": "CVE-2023-3341", "public_date": "2023-09-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-3341\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-3341"], "statement": "Since each incoming control channel message is fully parsed before its contents are authenticated, exploiting this flaw does not require the attacker to hold a valid RNDC key, only network access to the control channel\u2019s configured TCP port is necessary.", "threat_severity": "Important"}

{}