{ "document": { "aggregate_severity": { "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" }, { "category": "details", "text": "CVE-2023-50387: evaluate DNSSEC responses to prevent KeyTrap denial of service\n issue\n- CVE-2023-50868: fix Closest Encloser Proof aspect to prevent CPU consumption\n for SHA-1 computations in random subdomain attacks", "title": "Details" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/centos-stream8els/advisories/2026/clsa-2026_1768211704.json" }, { "category": "self", "summary": "https://cve.tuxcare.com/els/releases/CLSA-2026:1768211704", "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1768211704" } ], "tracking": { "current_release_date": "2026-01-12T09:55:42Z", "generator": { "date": "2026-01-12T09:55:42Z", "engine": { "name": "pyCSAF" } }, "id": "CLSA-2026:1768211704", "initial_release_date": "2026-01-12T09:55:42Z", "revision_history": [ { "date": "2026-01-12T09:55:42Z", "number": "1", "summary": "Initial version" } ], "status": "final", "version": "1" }, "title": "unbound: Fix of 2 CVEs" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Community Enterprise Operating System 8", "product": { "name": "Community Enterprise Operating System 8", "product_id": "CentOS-Stream-8", "product_identification_helper": { "cpe": "cpe:2.3:o:centos:centos:8:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Community Enterprise Operating System" } ], "category": "vendor", "name": "Red Hat, Inc." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "unbound-devel-0:1.16.2-5.el8.tuxcare.els1.i686", "product": { "name": "unbound-devel-0:1.16.2-5.el8.tuxcare.els1.i686", "product_id": "unbound-devel-0:1.16.2-5.el8.tuxcare.els1.i686", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/unbound-devel@1.16.2-5.el8.tuxcare.els1?arch=i686" } } }, { "category": "product_version", "name": "unbound-libs-0:1.16.2-5.el8.tuxcare.els1.i686", "product": { "name": "unbound-libs-0:1.16.2-5.el8.tuxcare.els1.i686", "product_id": "unbound-libs-0:1.16.2-5.el8.tuxcare.els1.i686", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/unbound-libs@1.16.2-5.el8.tuxcare.els1?arch=i686" } } } ], "category": "architecture", "name": "i686" }, { "branches": [ { "category": "product_version", "name": "unbound-devel-0:1.16.2-5.el8.tuxcare.els1.x86_64", "product": { "name": "unbound-devel-0:1.16.2-5.el8.tuxcare.els1.x86_64", "product_id": "unbound-devel-0:1.16.2-5.el8.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/unbound-devel@1.16.2-5.el8.tuxcare.els1?arch=x86_64" } } }, { "category": "product_version", "name": "unbound-libs-0:1.16.2-5.el8.tuxcare.els1.x86_64", "product": { "name": "unbound-libs-0:1.16.2-5.el8.tuxcare.els1.x86_64", "product_id": "unbound-libs-0:1.16.2-5.el8.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/unbound-libs@1.16.2-5.el8.tuxcare.els1?arch=x86_64" } } }, { "category": "product_version", "name": "python3-unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "product": { "name": "python3-unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "product_id": "python3-unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/python3-unbound@1.16.2-5.el8.tuxcare.els1?arch=x86_64" } } }, { "category": "product_version", "name": "unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "product": { "name": "unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "product_id": "unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/unbound@1.16.2-5.el8.tuxcare.els1?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "unbound-devel-0:1.16.2-5.el8.tuxcare.els1.i686 as a component of Community Enterprise Operating System 8", "product_id": "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els1.i686" }, "product_reference": "unbound-devel-0:1.16.2-5.el8.tuxcare.els1.i686", "relates_to_product_reference": "CentOS-Stream-8" }, { "category": "default_component_of", "full_product_name": { "name": "unbound-devel-0:1.16.2-5.el8.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 8", "product_id": "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els1.x86_64" }, "product_reference": "unbound-devel-0:1.16.2-5.el8.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-Stream-8" }, { "category": "default_component_of", "full_product_name": { "name": "unbound-libs-0:1.16.2-5.el8.tuxcare.els1.i686 as a component of Community Enterprise Operating System 8", "product_id": "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els1.i686" }, "product_reference": "unbound-libs-0:1.16.2-5.el8.tuxcare.els1.i686", "relates_to_product_reference": "CentOS-Stream-8" }, { "category": "default_component_of", "full_product_name": { "name": "unbound-libs-0:1.16.2-5.el8.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 8", "product_id": "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els1.x86_64" }, "product_reference": "unbound-libs-0:1.16.2-5.el8.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-Stream-8" }, { "category": "default_component_of", "full_product_name": { "name": "python3-unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 8", "product_id": "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64" }, "product_reference": "python3-unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-Stream-8" }, { "category": "default_component_of", "full_product_name": { "name": "unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 8", "product_id": "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64" }, "product_reference": "unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-Stream-8" } ] }, "vulnerabilities": [ { "cve": "CVE-2023-50868", "cwe": { "id": "CWE-400", "name": "Uncontrolled Resource Consumption" }, "notes": [ { "category": "description", "text": "The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the \"NSEC3\" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els1.i686", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els1.i686", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els1.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2023-50868" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2024/02/16/2", "url": "http://www.openwall.com/lists/oss-security/2024/02/16/2" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2024/02/16/3", "url": "http://www.openwall.com/lists/oss-security/2024/02/16/3" }, { "category": "external", "summary": "https://access.redhat.com/security/cve/CVE-2023-50868", "url": "https://access.redhat.com/security/cve/CVE-2023-50868" }, { "category": "external", "summary": "https://bugzilla.suse.com/show_bug.cgi?id=1219826", "url": "https://bugzilla.suse.com/show_bug.cgi?id=1219826" }, { "category": "external", "summary": "https://datatracker.ietf.org/doc/html/rfc5155", "url": "https://datatracker.ietf.org/doc/html/rfc5155" }, { "category": "external", "summary": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html", "url": 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"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/" } ], "release_date": "2024-02-14T16:15:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-01-12T09:55:06.503552Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1768211704", "product_ids": [ "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els1.i686", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els1.i686", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els1.x86_64" ], "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1768211704" } ], "scores": [ { "cvss_v3": { "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" }, "products": [ "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els1.i686", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els1.i686", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els1.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Important" } ] } ] }