{ "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", "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/centos7els/vex/2021/cve-2021-23017-els_os-centos7els.json" } ], "title": "Security update on CVE-2021-23017", "tracking": { "current_release_date": "2025-12-23T20:55:41Z", "generator": { "date": "2025-12-23T20:55:41Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2021-23017-ELS_OS-CENTOS7ELS", "initial_release_date": "2021-06-01T13:15:00Z", "revision_history": [ { "date": "2021-06-01T13:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2025-10-16T19:36:59Z", "number": "2", "summary": "Official Publication" }, { "date": "2025-11-29T10:58:31Z", "number": "3", "summary": "Update document" }, { "date": "2025-12-23T20:55:41Z", "number": "4", "summary": "Update document" } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Community Enterprise Operating System 7", "product": { "name": "Community Enterprise Operating System 7", "product_id": "CentOS-7", "product_identification_helper": { "cpe": "cpe:2.3:o:centos:centos:7:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Community Enterprise Operating System" } ], "category": "vendor", "name": "Red Hat, Inc." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "nginx-1:1.20.1-10.el7.tuxcare.els1.x86_64", "product": { "name": "nginx-1:1.20.1-10.el7.tuxcare.els1.x86_64", "product_id": "nginx-1:1.20.1-10.el7.tuxcare.els1.x86_64", "product_identification_helper": { "purl": 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"product_reference": "nginx-mod-mail-1:1.20.1-10.el7.x86_64", "relates_to_product_reference": "CentOS-7" }, { "category": "default_component_of", "full_product_name": { "name": "nginx-mod-stream-1:1.20.1-10.el7.x86_64 as a component of Community Enterprise Operating System 7", "product_id": "CentOS-7:nginx-mod-stream-1:1.20.1-10.el7.x86_64" }, "product_reference": "nginx-mod-stream-1:1.20.1-10.el7.x86_64", "relates_to_product_reference": "CentOS-7" } ] }, "vulnerabilities": [ { "cve": "CVE-2021-23017", "cwe": { "id": "CWE-193", "name": "Off-by-one Error" }, "notes": [ { "category": "description", "text": "A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact.", "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-7:nginx-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-all-modules-1:1.20.1-10.el7.tuxcare.els1.noarch", "CentOS-7:nginx-filesystem-1:1.20.1-10.el7.tuxcare.els1.noarch", "CentOS-7:nginx-mod-devel-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-mod-http-image-filter-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-mod-http-perl-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-mod-http-xslt-filter-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-mod-mail-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-mod-stream-1:1.20.1-10.el7.tuxcare.els1.x86_64" ], "known_affected": [ "CentOS-7:nginx-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-all-modules-1:1.20.1-10.el7.noarch", "CentOS-7:nginx-filesystem-1:1.20.1-10.el7.noarch", "CentOS-7:nginx-mod-devel-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-http-image-filter-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-http-perl-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-http-xslt-filter-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-mail-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-stream-1:1.20.1-10.el7.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2021-23017" }, { "category": "external", "summary": "http://mailman.nginx.org/pipermail/nginx-announce/2021/000300.html", "url": "http://mailman.nginx.org/pipermail/nginx-announce/2021/000300.html" }, { "category": "external", "summary": "http://packetstormsecurity.com/files/167720/Nginx-1.20.0-Denial-Of-Service.html", "url": "http://packetstormsecurity.com/files/167720/Nginx-1.20.0-Denial-Of-Service.html" }, { "category": "external", "summary": "https://lists.apache.org/thread.html/r37e6b2165f7c910d8e15fd54f4697857619ad2625f56583802004009%40%3Cnotifications.apisix.apache.org%3E", "url": "https://lists.apache.org/thread.html/r37e6b2165f7c910d8e15fd54f4697857619ad2625f56583802004009%40%3Cnotifications.apisix.apache.org%3E" }, { "category": "external", "summary": "https://lists.apache.org/thread.html/r4d4966221ca399ce948ef34884652265729d7d9ef8179c78d7f17e7f%40%3Cnotifications.apisix.apache.org%3E", "url": "https://lists.apache.org/thread.html/r4d4966221ca399ce948ef34884652265729d7d9ef8179c78d7f17e7f%40%3Cnotifications.apisix.apache.org%3E" }, { "category": "external", "summary": "https://lists.apache.org/thread.html/r6fc5c57b38e93e36213e9a18c8a4e5dbd5ced1c7e57f08a1735975ba%40%3Cnotifications.apisix.apache.org%3E", "url": "https://lists.apache.org/thread.html/r6fc5c57b38e93e36213e9a18c8a4e5dbd5ced1c7e57f08a1735975ba%40%3Cnotifications.apisix.apache.org%3E" }, { "category": "external", "summary": "https://lists.apache.org/thread.html/rf232eecd47fdc44520192810560303073cefd684b321f85e311bad31%40%3Cnotifications.apisix.apache.org%3E", "url": "https://lists.apache.org/thread.html/rf232eecd47fdc44520192810560303073cefd684b321f85e311bad31%40%3Cnotifications.apisix.apache.org%3E" }, { "category": "external", "summary": "https://lists.apache.org/thread.html/rf318aeeb4d7a3a312734780b47de83cefb7e6995da0b2cae5c28675c%40%3Cnotifications.apisix.apache.org%3E", "url": "https://lists.apache.org/thread.html/rf318aeeb4d7a3a312734780b47de83cefb7e6995da0b2cae5c28675c%40%3Cnotifications.apisix.apache.org%3E" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7SFVYHC7OXTEO4SMBWXDVK6E5IMEYMEE/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7SFVYHC7OXTEO4SMBWXDVK6E5IMEYMEE/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNKOP2JR5L7KCIZTJRZDCUPJTUONMC5I/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNKOP2JR5L7KCIZTJRZDCUPJTUONMC5I/" }, { "category": "external", "summary": "https://security.netapp.com/advisory/ntap-20210708-0006/", "url": "https://security.netapp.com/advisory/ntap-20210708-0006/" }, { "category": "external", "summary": "https://support.f5.com/csp/article/K12331123%2C", "url": "https://support.f5.com/csp/article/K12331123%2C" }, { "category": "external", "summary": "https://www.oracle.com/security-alerts/cpuapr2022.html", "url": "https://www.oracle.com/security-alerts/cpuapr2022.html" }, { "category": "external", "summary": "https://www.oracle.com/security-alerts/cpujan2022.html", "url": "https://www.oracle.com/security-alerts/cpujan2022.html" }, { "category": "external", "summary": "https://www.oracle.com/security-alerts/cpuoct2021.html", "url": "https://www.oracle.com/security-alerts/cpuoct2021.html" } ], "release_date": "2021-06-01T13:15:00Z", "remediations": [ { "category": "none_available", "details": "Affected", "product_ids": [ "CentOS-7:nginx-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-all-modules-1:1.20.1-10.el7.noarch", "CentOS-7:nginx-filesystem-1:1.20.1-10.el7.noarch", "CentOS-7:nginx-mod-devel-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-http-image-filter-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-http-perl-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-http-xslt-filter-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-mail-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-stream-1:1.20.1-10.el7.x86_64" ] } ], "scores": [ { "cvss_v2": { "accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0" }, "cvss_v3": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L", "version": "3.1" }, "products": [ "CentOS-7:nginx-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-all-modules-1:1.20.1-10.el7.noarch", "CentOS-7:nginx-all-modules-1:1.20.1-10.el7.tuxcare.els1.noarch", "CentOS-7:nginx-filesystem-1:1.20.1-10.el7.noarch", "CentOS-7:nginx-filesystem-1:1.20.1-10.el7.tuxcare.els1.noarch", "CentOS-7:nginx-mod-devel-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-mod-devel-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-http-image-filter-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-mod-http-image-filter-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-http-perl-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-mod-http-perl-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-http-xslt-filter-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-mod-http-xslt-filter-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-mail-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-mod-mail-1:1.20.1-10.el7.x86_64", "CentOS-7:nginx-mod-stream-1:1.20.1-10.el7.tuxcare.els1.x86_64", "CentOS-7:nginx-mod-stream-1:1.20.1-10.el7.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Important" } ] } ] }