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Alternativamente, un atacante fuera de la ruta tendr\u00eda que adivinar correctamente cu\u00e1ndo fue enviada una petici\u00f3n firmada por TSIG, junto con otras caracter\u00edsticas del paquete y mensaje, y falsificar una respuesta truncada para desencadenar un fallo de aserci\u00f3n, causando la salida del servidor."}], "id": "CVE-2020-8622", "lastModified": "2023-11-07T03:26:38.710", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-officer@isc.org", "type": "Secondary"}]}, "published": "2020-08-21T21:15:12.247", "references": [{"source": "security-officer@isc.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html"}, {"source": "security-officer@isc.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html"}, {"source": "security-officer@isc.org", "tags": ["Vendor Advisory"], "url": "https://kb.isc.org/docs/cve-2020-8622"}, {"source": "security-officer@isc.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00053.html"}, {"source": "security-officer@isc.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQN62GBMCIC5AY4KYADGXNKVY6AJKSJE/"}, {"source": "security-officer@isc.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZKAMJZXR66P6S5LEU4SN7USSNCWTXEXP/"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202008-19"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20200827-0003/"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4468-1/"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4468-2/"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2020/dsa-4752"}, {"source": "security-officer@isc.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"}, {"source": "security-officer@isc.org", "tags": ["Third Party Advisory"], "url": "https://www.synology.com/security/advisory/Synology_SA_20_19"}], "sourceIdentifier": "security-officer@isc.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-617"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank ISC for reporting this issue. Upstream acknowledges Dave Feldman (Oracle), Jeff Warren (Oracle), and Joel Cunningham (Oracle) as the original reporters.", "affected_release": [{"advisory": "RHSA-2020:4183", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "bind-32:9.8.2-0.68.rc1.el6_10.8", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2020-10-07T00:00:00Z"}, {"advisory": "RHSA-2020:5011", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "bind-32:9.11.4-26.P2.el7_9.2", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-11-10T00:00:00Z"}, {"advisory": "RHSA-2020:4992", "cpe": "cpe:/o:redhat:rhel_eus:7.6", "package": "bind-32:9.9.4-74.el7_6.5", "product_name": "Red Hat Enterprise Linux 7.6 Extended Update Support", "release_date": "2020-11-10T00:00:00Z"}, {"advisory": "RHSA-2020:5203", "cpe": "cpe:/o:redhat:rhel_eus:7.7", "package": "bind-32:9.11.4-9.P2.el7_7.3", "product_name": "Red Hat Enterprise Linux 7.7 Extended Update Support", "release_date": "2020-11-24T00:00:00Z"}, {"advisory": "RHSA-2020:4500", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "bind-32:9.11.20-5.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-11-04T00:00:00Z"}, {"advisory": "RHSA-2020:4500", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "bind-32:9.11.20-5.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-11-04T00:00:00Z"}], "bugzilla": {"description": "bind: truncated TSIG response can lead to an assertion failure", "id": "1869473", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1869473"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-400", "details": ["In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.", "A flaw was found in bind. An assertion failure can occur when trying to verify a truncated response to a TSIG-signed request. The highest threat from this vulnerability is to system availability."], "name": "CVE-2020-8622", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "bind", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "bind97", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2020-08-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-8622\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-8622\nhttps://kb.isc.org/docs/cve-2020-8622"], "threat_severity": "Moderate", "upstream_fix": "bind 9.11.22, bind 9.16.6, bind 9.17.4"}