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    CVE-2016-7427

    The broadcast mode replay prevention functionality in ntpd in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (reject broadcast mode packets) via a crafted broadcast mode packet.

    Published:Nov 21, 2016
    Last Modified:Apr 20, 2025
    EPS:Jan 13, 2017
    EPSS Score:0.06715
    CVSS Score:4.3

    Affected Products

    Vendor
    Ntp
    Product
    Ntp

    Exploits

    No exploit reference

    Related CVEs

    CVE-2023-26554 (CVSS 5.6) — mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when adding a '\0' character. An advers…
    CVE-2023-26555 (CVSS 6.4) — praecis_parse in ntpd/refclock_palisade.c in NTP 4.2.8p15 has an out-of-bounds write. Any attack method would …
    CVE-2023-26552 (CVSS 5.6) — mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when adding a decimal point. An adversa…
    CVE-2023-26553 (CVSS 5.6) — mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when copying the trailing number. An ad…
    CVE-2023-26551 (CVSS 5.6) — mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write in the cp<cpdec while loop. An adversar…
    CVE-2020-15025 (CVSS 4.4) — ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of servic…
    CVE-2018-8956 (CVSS 5.3) — ntpd in ntp 4.2.8p10, 4.2.8p11, 4.2.8p12 and 4.2.8p13 allow remote attackers to prevent a broadcast client fro…
    CVE-2020-11868 (CVSS 7.5) — ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows an off-path attacker to block unauthenticated sync…
    CVE-2020-13817 (CVSS 7.4) — ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service (dae…
    CVE-2019-11331 (CVSS 8.1) — Network Time Protocol (NTP), as specified in RFC 5905, uses port 123 even for modes where a fixed port number …

    References

    http://nwtime.org/ntp428p9_release/
    http://support.ntp.org/bin/view/Main/NtpBug3114
    http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
    http://www.securityfocus.com/bid/94447
    http://www.securitytracker.com/id/1037354
    https://bto.bluecoat.com/security-advisory/sa139
    https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
    https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
    https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03883en_us
    https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03899en_us
    https://usn.ubuntu.com/3707-2/
    https://www.kb.cert.org/vuls/id/633847
    http://nwtime.org/ntp428p9_release/
    http://support.ntp.org/bin/view/Main/NtpBug3114
    http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
    http://www.securityfocus.com/bid/94447
    http://www.securitytracker.com/id/1037354
    https://bto.bluecoat.com/security-advisory/sa139
    https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
    https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
    https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03883en_us
    https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03899en_us
    https://usn.ubuntu.com/3707-2/
    https://www.kb.cert.org/vuls/id/633847

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High