CVE-2018-21029

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NOTE: This has been disputed by the developer as not a vulnerability since hostname validation does not have anything to do with this issue (i.e. there is no hostname to be sent)."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://github.com/systemd/systemd/issues/9397", "refsource": "MISC", "url": "https://github.com/systemd/systemd/issues/9397"}, {"name": "https://blog.cloudflare.com/dns-encryption-explained/", "refsource": "MISC", "url": "https://blog.cloudflare.com/dns-encryption-explained/"}, {"name": "https://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63", "refsource": "MISC", "url": "https://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63"}, {"name": "FEDORA-2019-4c3ce3aa5c", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/"}, {"name": "https://security.netapp.com/advisory/ntap-20191122-0002/", "refsource": "CONFIRM", "url": "https://security.netapp.com/advisory/ntap-20191122-0002/"}, {"name": "https://github.com/systemd/systemd/pull/13870", "refsource": "MISC", "url": "https://github.com/systemd/systemd/pull/13870"}, {"name": "https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207", "refsource": "MISC", "url": "https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207"}, {"name": "https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207", "refsource": "MISC", "url": "https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207"}, {"name": "https://tools.ietf.org/html/rfc7858#section-4.1", "refsource": "MISC", "url": "https://tools.ietf.org/html/rfc7858#section-4.1"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T12:19:27.514Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/systemd/systemd/issues/9397"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://blog.cloudflare.com/dns-encryption-explained/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63"}, {"name": "FEDORA-2019-4c3ce3aa5c", "tags": ["vendor-advisory", "x_refsource_FEDORA", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://security.netapp.com/advisory/ntap-20191122-0002/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/systemd/systemd/pull/13870"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://tools.ietf.org/html/rfc7858#section-4.1"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2018-21029", "datePublished": "2019-10-30T21:46:51.000Z", "dateReserved": "2019-10-30T00:00:00.000Z", "dateUpdated": "2024-08-05T12:19:27.514Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*", "matchCriteriaId": "6A177E47-87C0-4499-8DE8-3F7C75FF4FEE", "versionEndExcluding": "244", "versionStartIncluding": "239", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*", "matchCriteriaId": "80F0FA5D-8D3B-4C0E-81E2-87998286AF33", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [{"sourceIdentifier": "cve@mitre.org", "tags": ["disputed"]}], "descriptions": [{"lang": "en", "value": "systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname validation does not have anything to do with this issue (i.e. there is no hostname to be sent)"}, {"lang": "es", "value": "** EN DISPUTA ** systemd versiones 239 hasta la versi\u00f3n 245, acepta cualquier certificado firmado por parte de una autoridad de certificaci\u00f3n de confianza para DNS Over TLS. La indicaci\u00f3n de nombre de servidor (SNI) no se env\u00eda y no existe comprobaci\u00f3n de nombre de host con el backend GnuTLS. NOTA: Esto ha sido discutido por el desarrollador como una vulnerabilidad, ya que la validaci\u00f3n del hostname no tiene nada que ver con este problema (es decir, no hay ning\u00fan nombre de host que se env\u00ede)"}], "id": "CVE-2018-21029", "lastModified": "2026-06-17T01:53:59.387", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-10-30T22:15:10.667", "references": [{"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://blog.cloudflare.com/dns-encryption-explained/"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://github.com/systemd/systemd/issues/9397"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/systemd/systemd/pull/13870"}, {"source": "cve@mitre.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20191122-0002/"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://tools.ietf.org/html/rfc7858#section-4.1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://blog.cloudflare.com/dns-encryption-explained/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/systemd/systemd/blob/v239/man/resolved.conf.xml#L199-L207"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/systemd/systemd/blob/v243/man/resolved.conf.xml#L196-L207"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/systemd/systemd/blob/v243/src/resolve/resolved-dnstls-gnutls.c#L62-L63"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://github.com/systemd/systemd/issues/9397"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/systemd/systemd/pull/13870"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NLJVOJMB6ANDILRLDZK26YGLYBEPHKY/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20191122-0002/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://tools.ietf.org/html/rfc7858#section-4.1"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "systemd: incorrect certificate validation results in acceptance of any certificate signed by a trusted certificate authority for DNS over TLS", "id": "1771725", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1771725"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-295", "details": ["systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS. Server Name Indication (SNI) is not sent, and there is no hostname validation with the GnuTLS backend. NOTE: This has been disputed by the developer as not a vulnerability since hostname validation does not have anything to do with this issue (i.e. there is no hostname to be sent)", "A flaw in systemd-resolved was found to incorrectly verify certificates of a DNS resolver used for DNS Over TLS when the DNSOverTLS option is set to `yes`. A remote attacker in the network path between the vulnerable system and the DNS resolver may use this flaw to perform a man-in-the-middle attack and eavesdrop or modify DNS queries and responses. The attacker can learn the sites visited by a victim user, or redirect the victim user to malicious sites."], "name": "CVE-2018-21029", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "systemd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "systemd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "systemd", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2018-06-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2018-21029\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-21029"], "statement": "Versions of systemd as shipped with Red Hat Enterprise Linux 7 are not affected by this issue as they did not include support for DNSOverTLS option.\nVersions of systemd as shipped with Red Hat Enterprise Linux 8 are not affected by this issue as they did not support the `yes` value of the DNSOverTLS option.\nOpenShift Container Platform 4.1 ships a version of systemd from Red Hat Enterprise Linux 8 and is thus also not affected by this issue.", "threat_severity": "Moderate"}

{}