{ "document": { "aggregate_severity": { "text": "High" }, "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/oraclelinux7els/vex/2020/cve-2020-25682-els_os-oraclelinux7els.json" } ], "tracking": { "current_release_date": "2026-10-25T05:35:30Z", "generator": { "date": "2026-10-25T05:35:30Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2020-25682-ELS_OS-ORACLELINUX7ELS", "initial_release_date": "2020-01-01T00:00:00Z", "revision_history": [ { "date": "2020-01-01T00:00:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-10-25T05:35:30Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on CVE-2020-25682" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Oracle Linux 7", "product": { "name": "Oracle Linux 7", "product_id": "Oracle-Linux-7", "product_identification_helper": { "cpe": "cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Oracle Linux" } ], "category": "vendor", "name": "Oracle Corporation" }, { "branches": [ { "branches": [ { "category": "product_version", "name": "dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686", "product": { "name": "dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686", "product_id": "dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/dnsmasq-utils@2.76-17.0.3.el7_9.99.tuxcare.els5?arch=i686" } } }, { "category": "product_version", "name": "dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686", "product": { "name": "dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686", "product_id": "dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/dnsmasq@2.76-17.0.3.el7_9.99.tuxcare.els5?arch=i686" } } } ], "category": "architecture", "name": "i686" }, { "branches": [ { "category": "product_version", "name": "dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64", "product": { "name": "dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64", "product_id": "dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/dnsmasq-utils@2.76-17.0.3.el7_9.99.tuxcare.els5?arch=x86_64" } } }, { "category": "product_version", "name": "dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64", "product": { "name": "dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64", "product_id": "dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/dnsmasq@2.76-17.0.3.el7_9.99.tuxcare.els5?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686 as a component of Oracle Linux 7", "product_id": "Oracle-Linux-7:dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686" }, "product_reference": "dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686", "relates_to_product_reference": "Oracle-Linux-7" }, { "category": "default_component_of", "full_product_name": { "name": "dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64 as a component of Oracle Linux 7", "product_id": "Oracle-Linux-7:dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64" }, "product_reference": "dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64", "relates_to_product_reference": "Oracle-Linux-7" }, { "category": "default_component_of", "full_product_name": { "name": "dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686 as a component of Oracle Linux 7", "product_id": "Oracle-Linux-7:dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686" }, "product_reference": "dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686", "relates_to_product_reference": "Oracle-Linux-7" }, { "category": "default_component_of", "full_product_name": { "name": "dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64 as a component of Oracle Linux 7", "product_id": "Oracle-Linux-7:dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64" }, "product_reference": "dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64", "relates_to_product_reference": "Oracle-Linux-7" } ] }, "vulnerabilities": [ { "cve": "CVE-2020-25682", "cwe": { "id": "CWE-122", "name": "Heap-based Buffer Overflow" }, "notes": [ { "category": "description", "text": "A flaw was found in dnsmasq before 2.83. A buffer overflow vulnerability was discovered in the way dnsmasq extract names from DNS packets before validating them with DNSSEC data. An attacker on the network, who can create valid DNS replies, could use this flaw to cause an overflow with arbitrary data in a heap-allocated memory, possibly executing code on the machine. The flaw is in the rfc1035.c:extract_name() function, which writes data to the memory pointed by name assuming MAXDNAME*2 bytes are available in the buffer. However, in some code execution paths, it is possible extract_name() gets passed an offset from the base buffer, thus reducing, in practice, the number of available bytes that can be written in the buffer. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.", "title": "Vulnerability description" }, { "category": "other", "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.", "title": "Statement" } ], "product_status": { "known_not_affected": [ "Oracle-Linux-7:dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686", "Oracle-Linux-7:dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64", "Oracle-Linux-7:dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686", "Oracle-Linux-7:dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2020-25682" }, { "category": "external", "summary": "https://bugzilla.redhat.com/show_bug.cgi?id=1882014", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1882014" }, { "category": "external", "summary": "https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html", "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/" }, { "category": "external", "summary": "https://security.gentoo.org/glsa/202101-17", "url": "https://security.gentoo.org/glsa/202101-17" }, { "category": "external", "summary": "https://www.debian.org/security/2021/dsa-4844", "url": "https://www.debian.org/security/2021/dsa-4844" }, { "category": "external", "summary": "https://www.jsof-tech.com/disclosures/dnspooq/", "url": "https://www.jsof-tech.com/disclosures/dnspooq/" }, { "category": "external", "summary": "https://www.kb.cert.org/vuls/id/434904", "url": "https://www.kb.cert.org/vuls/id/434904" } ], "release_date": "2021-01-20T17:15:00Z", "threats": [ { "category": "impact", "details": "Important" }, { "category": "impact", "date": "2026-10-15T19:48:42.160937Z", "details": "important", "product_ids": [ "Oracle-Linux-7:dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686", "Oracle-Linux-7:dnsmasq-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64", "Oracle-Linux-7:dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.i686", "Oracle-Linux-7:dnsmasq-utils-0:2.76-17.0.3.el7_9.99.tuxcare.els5.x86_64" ] } ] } ] }