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{"affected_release": [{"advisory": "RHSA-2017:0252", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "ntp-0:4.2.6p5-10.el6_8.2", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2017-02-06T00:00:00Z"}, {"advisory": "RHSA-2017:0252", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "ntp-0:4.2.6p5-25.el7_3.1", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2017-02-06T00:00:00Z"}], "bugzilla": {"description": "ntp: Client rate limiting and server responses", "id": "1397345", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1397345"}, "csaw": false, "cvss": {"cvss_base_score": "4.3", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "status": "verified"}, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-400", "details": ["NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.", "It was found that when ntp is configured with rate limiting for all associations the limits are also applied to responses received from its configured sources. A remote attacker who knows the sources can cause a denial of service by preventing ntpd from accepting valid responses from its sources."], "mitigation": {"lang": "en:us", "value": "If you choose to use restrict default limited ..., be sure to use restrict source ... (without limited) to avoid this attack."}, "name": "CVE-2016-7426", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "ntp", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2016-11-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-7426\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-7426\nhttp://support.ntp.org/bin/view/Main/NtpBug3071"], "threat_severity": "Moderate"}