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    CVE-2016-7433

    NTP before 4.2.8p9 does not properly perform the initial sync calculations, which allows remote attackers to unspecified impact via unknown vectors, related to a "root distance that did not include the peer dispersion."

    Published:Nov 21, 2016
    Last Modified:Apr 20, 2025
    EPS:Jan 13, 2017
    EPSS Score:0.36227
    CVSS Score:5.3

    Affected Products

    Vendor
    Ntp
    Product
    Ntp
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-682 Incorrect Calculation

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-128 Integer Attacks
    CAPEC-129 Pointer Manipulation

    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://lists.opensuse.org/opensuse-updates/2016-12/msg00153.html
    http://nwtime.org/ntp428p9_release/
    http://rhn.redhat.com/errata/RHSA-2017-0252.html
    http://support.ntp.org/bin/view/Main/NtpBug3067
    http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
    http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20171129-01-ntpd-en
    http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
    http://www.securityfocus.com/archive/1/539955/100/0/threaded
    http://www.securityfocus.com/archive/1/540254/100/0/threaded
    http://www.securityfocus.com/archive/1/archive/1/539955/100/0/threaded
    http://www.securityfocus.com/archive/1/archive/1/540254/100/0/threaded
    http://www.securityfocus.com/bid/94455
    http://www.securitytracker.com/id/1037354
    http://www.ubuntu.com/usn/USN-3349-1
    https://bto.bluecoat.com/security-advisory/sa139
    https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
    https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMSYVQMMF37MANYEO7KBHOPSC74EKGN/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PABKEYX6ABBFJZGMXKH57X756EJUDS3C/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U5E3XBBCK5IXOLDAH2E4M3QKIYIHUMMP/
    https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
    https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
    https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2017-227
    https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2017-227/
    https://www.kb.cert.org/vuls/id/633847
    http://lists.opensuse.org/opensuse-updates/2016-12/msg00153.html
    http://nwtime.org/ntp428p9_release/
    http://rhn.redhat.com/errata/RHSA-2017-0252.html
    http://support.ntp.org/bin/view/Main/NtpBug3067
    http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
    http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20171129-01-ntpd-en
    http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
    http://www.securityfocus.com/archive/1/539955/100/0/threaded
    http://www.securityfocus.com/archive/1/540254/100/0/threaded
    http://www.securityfocus.com/archive/1/archive/1/539955/100/0/threaded
    http://www.securityfocus.com/archive/1/archive/1/540254/100/0/threaded
    http://www.securityfocus.com/bid/94455
    http://www.securitytracker.com/id/1037354
    http://www.ubuntu.com/usn/USN-3349-1
    https://bto.bluecoat.com/security-advisory/sa139
    https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
    https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMSYVQMMF37MANYEO7KBHOPSC74EKGN/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PABKEYX6ABBFJZGMXKH57X756EJUDS3C/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U5E3XBBCK5IXOLDAH2E4M3QKIYIHUMMP/
    https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
    https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
    https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2017-227
    https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2017-227/
    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