{ "document": { "aggregate_severity": { "text": "Medium" }, "category": "csaf_vex", "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" } ], "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/centos6els/vex/2022/cve-2022-30699-els_os-centos6els.json" } ], "tracking": { "current_release_date": "2026-10-28T10:59:25Z", "generator": { "date": "2026-10-28T10:59:25Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2022-30699-ELS_OS-CENTOS6ELS", "initial_release_date": "2022-08-01T15:15:00Z", "revision_history": [ { "date": "2022-08-01T15:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-10-28T10:59:25Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on 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"CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "unbound-0:1.4.20-29.el6_10.1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:unbound-0:1.4.20-29.el6_10.1.x86_64" }, "product_reference": "unbound-0:1.4.20-29.el6_10.1.x86_64", "relates_to_product_reference": "CentOS-6" } ] }, "vulnerabilities": [ { "cve": "CVE-2022-30699", "cwe": { "id": "CWE-613", "name": "Insufficient Session Expiration" }, "notes": [ { "category": "description", "text": "NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the \"ghost domain names\" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue domain name when the cached delegation information is about to expire. The rogue nameserver delays the response so that the cached delegation information is expired. Upon receiving the delayed answer containing the delegation information, Unbound overwrites the now expired entries. This action can be repeated when the delegation information is about to expire making the rogue delegation information ever-updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the cached delegation information can be overwritten.", "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": { "known_affected": [ "CentOS-6:unbound-0:1.4.20-29.el6_10.1.i686", "CentOS-6:unbound-0:1.4.20-29.el6_10.1.tuxcare.els2.i686", "CentOS-6:unbound-0:1.4.20-29.el6_10.1.tuxcare.els2.x86_64", "CentOS-6:unbound-0:1.4.20-29.el6_10.1.x86_64", "CentOS-6:unbound-devel-0:1.4.20-29.el6_10.1.i686", "CentOS-6:unbound-devel-0:1.4.20-29.el6_10.1.tuxcare.els2.i686", "CentOS-6:unbound-devel-0:1.4.20-29.el6_10.1.tuxcare.els2.x86_64", "CentOS-6:unbound-devel-0:1.4.20-29.el6_10.1.x86_64", "CentOS-6:unbound-libs-0:1.4.20-29.el6_10.1.i686", "CentOS-6:unbound-libs-0:1.4.20-29.el6_10.1.tuxcare.els2.i686", "CentOS-6:unbound-libs-0:1.4.20-29.el6_10.1.tuxcare.els2.x86_64", "CentOS-6:unbound-libs-0:1.4.20-29.el6_10.1.x86_64", "CentOS-6:unbound-python-0:1.4.20-29.el6_10.1.i686", "CentOS-6:unbound-python-0:1.4.20-29.el6_10.1.tuxcare.els2.i686", "CentOS-6:unbound-python-0:1.4.20-29.el6_10.1.tuxcare.els2.x86_64", "CentOS-6:unbound-python-0:1.4.20-29.el6_10.1.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2022-30699" }, { "category": "external", "summary": "https://lists.debian.org/debian-lts-announce/2023/03/msg00024.html", "url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00024.html" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5L3ZFWZZFPBIL654BG75RWXUMPFQJ5EC/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5L3ZFWZZFPBIL654BG75RWXUMPFQJ5EC/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D35CX4SCZVNKZTWJXPDFTHWZHINMGEZD/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D35CX4SCZVNKZTWJXPDFTHWZHINMGEZD/" }, { "category": "external", "summary": "https://security.gentoo.org/glsa/202212-02", "url": "https://security.gentoo.org/glsa/202212-02" }, { "category": "external", "summary": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2022-30698_CVE-2022-30699.txt", "url": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2022-30698_CVE-2022-30699.txt" } ], "release_date": "2022-08-01T15:15:00Z", "remediations": [ { "category": "no_fix_planned", "date": "2026-10-15T10:08:33.253442Z", "details": "This issue only affects Unbound instances up to 1.16.1 that perform full recursion to authoritative servers; deployments configured to forward all queries to a trusted upstream resolver do not contact attacker-controlled nameservers, so the timing-based overwrite condition cannot be triggered. Exploitation further requires the attacker to control the queried domain’s authoritative server and precisely time responses around delegation TTL expiry, yielding cache manipulation for that domain but no code execution or privilege escalation. In centrally managed enterprise VM/server environments that rely on upstream DNS forwarders rather than direct recursion, practical exposure is minimal and this CVE can be safely deprioritized.", "product_ids": [ "CentOS-6:unbound-0:1.4.20-29.el6_10.1.i686", "CentOS-6:unbound-0:1.4.20-29.el6_10.1.tuxcare.els2.i686", "CentOS-6:unbound-0:1.4.20-29.el6_10.1.tuxcare.els2.x86_64", "CentOS-6:unbound-0:1.4.20-29.el6_10.1.x86_64", "CentOS-6:unbound-devel-0:1.4.20-29.el6_10.1.i686", "CentOS-6:unbound-devel-0:1.4.20-29.el6_10.1.tuxcare.els2.i686", "CentOS-6:unbound-devel-0:1.4.20-29.el6_10.1.tuxcare.els2.x86_64", "CentOS-6:unbound-devel-0:1.4.20-29.el6_10.1.x86_64", "CentOS-6:unbound-libs-0:1.4.20-29.el6_10.1.i686", "CentOS-6:unbound-libs-0:1.4.20-29.el6_10.1.tuxcare.els2.i686", "CentOS-6:unbound-libs-0:1.4.20-29.el6_10.1.tuxcare.els2.x86_64", "CentOS-6:unbound-libs-0:1.4.20-29.el6_10.1.x86_64", "CentOS-6:unbound-python-0:1.4.20-29.el6_10.1.i686", "CentOS-6:unbound-python-0:1.4.20-29.el6_10.1.tuxcare.els2.i686", "CentOS-6:unbound-python-0:1.4.20-29.el6_10.1.tuxcare.els2.x86_64", "CentOS-6:unbound-python-0:1.4.20-29.el6_10.1.x86_64" ] } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1" }, "products": [ "CentOS-6:unbound-0:1.4.20-29.el6_10.1.i686", "CentOS-6:unbound-0:1.4.20-29.el6_10.1.tuxcare.els2.i686", "CentOS-6:unbound-0:1.4.20-29.el6_10.1.tuxcare.els2.x86_64", "CentOS-6:unbound-0:1.4.20-29.el6_10.1.x86_64", "CentOS-6:unbound-devel-0:1.4.20-29.el6_10.1.i686", "CentOS-6:unbound-devel-0:1.4.20-29.el6_10.1.tuxcare.els2.i686", "CentOS-6:unbound-devel-0:1.4.20-29.el6_10.1.tuxcare.els2.x86_64", "CentOS-6:unbound-devel-0:1.4.20-29.el6_10.1.x86_64", "CentOS-6:unbound-libs-0:1.4.20-29.el6_10.1.i686", "CentOS-6:unbound-libs-0:1.4.20-29.el6_10.1.tuxcare.els2.i686", "CentOS-6:unbound-libs-0:1.4.20-29.el6_10.1.tuxcare.els2.x86_64", "CentOS-6:unbound-libs-0:1.4.20-29.el6_10.1.x86_64", "CentOS-6:unbound-python-0:1.4.20-29.el6_10.1.i686", "CentOS-6:unbound-python-0:1.4.20-29.el6_10.1.tuxcare.els2.i686", "CentOS-6:unbound-python-0:1.4.20-29.el6_10.1.tuxcare.els2.x86_64", "CentOS-6:unbound-python-0:1.4.20-29.el6_10.1.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Moderate" } ] } ] }