CVE-2021-20319

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{"affected": [{"affectedData": [{"product": "coreos-installer", "vendor": "n/a", "versions": [{"status": "affected", "version": "Affects coreos-installer before v0.10.1, Fixed in v0.10.1."}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:redhat:coreos-installer:*:*:*:*:*:*:*:*", "matchCriteriaId": "CC97AE96-45A5-41F7-8300-FA9957F83E6A", "versionEndExcluding": "0.10.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An improper signature verification vulnerability was found in coreos-installer. A specially crafted gzip installation image can bypass the image signature verification and as a consequence can lead to the installation of unsigned content. An attacker able to modify the original installation image can write arbitrary data, and achieve full access to the node being installed."}, {"lang": "es", "value": "Se ha encontrado una vulnerabilidad de verificaci\u00f3n de firma inapropiada en coreos-installer. Una imagen de instalaci\u00f3n gzip especialmente dise\u00f1ada puede omitir la verificaci\u00f3n de la firma de la imagen y, como consecuencia, puede conllevar a una instalaci\u00f3n de contenido no firmado. Un atacante capaz de modificar la imagen de instalaci\u00f3n original puede escribir datos arbitrarios y conseguir acceso completo al nodo que se est\u00e1 instalando"}], "id": "CVE-2021-20319", "lastModified": "2026-06-17T03:33:39.947", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-03-04T18:15:08.060", "references": [{"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2011862"}, {"source": "secalert@redhat.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/coreos/coreos-installer/pull/659/commits/ad243c6f0eff2835b2da56ca5f7f33af76253c89"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://github.com/coreos/coreos-installer/security/advisories/GHSA-3r3g-g73x-g593"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2011862"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/coreos/coreos-installer/pull/659/commits/ad243c6f0eff2835b2da56ca5f7f33af76253c89"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/coreos/coreos-installer/security/advisories/GHSA-3r3g-g73x-g593"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-347"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-347"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "This issue was discovered by Paul Wallrabe (Red Hat).", "affected_release": [{"advisory": "RHSA-2021:4008", "cpe": "cpe:/a:redhat:openshift:4.6::el8", "package": "coreos-installer-0:0.6.0-4.rhaos4.6.el8", "product_name": "Red Hat OpenShift Container Platform 4.6", "release_date": "2021-11-03T00:00:00Z"}, {"advisory": "RHSA-2021:3930", "cpe": "cpe:/a:redhat:openshift:4.7::el8", "package": "coreos-installer-0:0.8.0-4.rhaos4.7.el8", "product_name": "Red Hat OpenShift Container Platform 4.7", "release_date": "2021-10-27T00:00:00Z"}, {"advisory": "RHSA-2021:3926", "cpe": "cpe:/a:redhat:openshift:4.8::el8", "package": "coreos-installer-0:0.9.0-7.rhaos4.8.el8", "product_name": "Red Hat OpenShift Container Platform 4.8", "release_date": "2021-10-27T00:00:00Z"}, {"advisory": "RHSA-2021:3934", "cpe": "cpe:/a:redhat:openshift:4.9::el8", "package": "coreos-installer-0:0.10.1-1.rhaos4.9.el8", "product_name": "Red Hat OpenShift Container Platform 4.9", "release_date": "2021-10-26T00:00:00Z"}], "bugzilla": {"description": "coreos-installer: incorrect signature verification on gzip-compressed install images", "id": "2011862", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2011862"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-347", "details": ["An improper signature verification vulnerability was found in coreos-installer. A specially crafted gzip installation image can bypass the image signature verification and as a consequence can lead to the installation of unsigned content. An attacker able to modify the original installation image can write arbitrary data, and achieve full access to the node being installed.", "An improper signature verification vulnerability was found in coreos-installer. A specially crafted gzip installation image can bypass the image signature verification and as a consequence can lead to the installation of unsigned content. An attacker able to modify the original installation image can write arbitrary data, and achieve full access to the node being installed."], "name": "CVE-2021-20319", "public_date": "2021-10-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-20319\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-20319\nhttps://github.com/coreos/coreos-installer/security/advisories/GHSA-3r3g-g73x-g593"], "statement": "This vulnerability impacts only a specific User-Provisioned Infrastructure (UPI) installation flow where coreos-installer is used and when gzip-compressed images are configured as the installation source. \nBecause this flow does not occur in default usage, Red Hat considers this case as a Moderate impact flaw.", "threat_severity": "Moderate"}

{}