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{"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", "upstream_fix": "systemd 244"}