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{"acknowledgement": "Red Hat would like to thank Aanchal Malhotra (Boston University), Isaac E. Cohen (Boston University), and Sharon Goldberg (Boston University) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2015:1930", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "ntp-0:4.2.6p5-5.el6_7.2", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2015-10-26T00:00:00Z"}, {"advisory": "RHSA-2015:2520", "cpe": "cpe:/o:redhat:rhel_eus:6.5", "package": "ntp-0:4.2.6p5-2.el6_5.1", "product_name": "Red Hat Enterprise Linux 6.5 Extended Update Support", "release_date": "2015-11-26T00:00:00Z"}, {"advisory": "RHSA-2015:2520", "cpe": "cpe:/o:redhat:rhel_eus:6.6", "package": "ntp-0:4.2.6p5-3.el6_6.1", "product_name": "Red Hat Enterprise Linux 6.6 Extended Update Support", "release_date": "2015-11-26T00:00:00Z"}, {"advisory": "RHSA-2015:1930", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "ntp-0:4.2.6p5-19.el7_1.3", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2015-10-26T00:00:00Z"}], "bugzilla": {"description": "ntp: disabling synchronization via crafted KoD packet", "id": "1271070", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1271070"}, "csaw": false, "cvss": {"cvss_base_score": "6.4", "cvss_scoring_vector": "AV:N/AC:L/Au:N/C:N/I:P/A:P", "status": "verified"}, "cwe": "CWE-20", "details": ["The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted \"KOD\" messages.", "It was discovered that ntpd as a client did not correctly check timestamps in Kiss-of-Death packets. A remote attacker could use this flaw to send a crafted Kiss-of-Death packet to an ntpd client that would increase the client's polling interval value, and effectively disable synchronization with the server."], "name": "CVE-2015-7704", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "ntp", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:rhel_eus:6.4", "fix_state": "Not affected", "package_name": "ntp", "product_name": "Red Hat Enterprise Linux Extended Update Support 6.4"}], "public_date": "2015-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-7704\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-7704\nhttps://www.cs.bu.edu/~goldbe/NTPattack.html"], "statement": "This issue did not affect the versions of ntp as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6.4, as they do not include support for KoD packets.", "threat_severity": "Important", "upstream_fix": "ntp 4.2.8p4"}