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{"bugzilla": {"description": "unbound: uninitialized memory accesses leads to crash via a crafted NOTIFY query", "id": "1767955", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1767955"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-822", "details": ["Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query. The source IP address of the query must match an access-control rule."], "name": "CVE-2019-16866", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "unbound", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "unbound", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "unbound", "product_name": "Red Hat Enterprise Linux 8"}], "public_date": "2019-10-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-16866\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-16866\nhttps://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt"], "statement": "This issue has been classified as having low security impact because:\n- per default, unbound is not configured to listen on a public interface\n- per default, the ACL is limited to localhost, so even if listening to a public interface, the crash cannot happen per default\nIt mostly affects people running unbound as a \"public\" DNS resolver. Using such configurations, unbound has no valuable secrets that could be obtained by a successful attack, so at best the server crashes and restarts, resulting in an empty DNS cache. Sustained sending of packets would result in a DoS though.", "threat_severity": "Low"}