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    CVE-2016-1548

    An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer->dst timestamp recorded for that server. After making this switch, the client in NTP 4.2.8p4 and earlier and NTPSec aa48d001683e5b791a743ec9c575aaf7d867a2b0c will reject all future legitimate server responses. It is possible to force the victim client to move time after the mode has been changed. ntpq gives no indication that the mode has been switched.

    Published:Apr 26, 2016
    Last Modified:Apr 20, 2025
    EPS:Jan 6, 2017
    EPSS Score:0.01653
    CVSS Score:7.2

    Affected Products

    Vendor
    Ntp
    Product
    Ntp
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Eus

    Exploits

    http://www.talosintelligence.com/reports/TALOS-2016-0082/http://www.talosintelligence.com/reports/TALOS-2016-0082/

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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.fedoraproject.org/pipermail/package-announce/2016-May/183647.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html
    http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html
    http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html
    http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
    http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
    http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
    http://packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html
    http://rhn.redhat.com/errata/RHSA-2016-1552.html
    http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd
    http://www.debian.org/security/2016/dsa-3629
    http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
    http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
    http://www.securityfocus.com/archive/1/538233/100/0/threaded
    http://www.securityfocus.com/archive/1/archive/1/538233/100/0/threaded
    http://www.securityfocus.com/bid/88264
    http://www.securitytracker.com/id/1035705
    http://www.talosintelligence.com/reports/TALOS-2016-0082/
    http://www.ubuntu.com/usn/USN-3096-1
    https://access.redhat.com/errata/RHSA-2016:1141
    https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
    https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
    https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
    https://security.gentoo.org/glsa/201607-15
    https://security.netapp.com/advisory/ntap-20171004-0002/
    https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
    https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
    https://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19
    https://www.debian.org/security/2016/dsa-3629
    https://www.kb.cert.org/vuls/id/718152
    https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0082
    http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html
    http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html
    http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html
    http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html
    http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
    http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
    http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
    http://packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html
    http://rhn.redhat.com/errata/RHSA-2016-1552.html
    http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd
    http://www.debian.org/security/2016/dsa-3629
    http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
    http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
    http://www.securityfocus.com/archive/1/538233/100/0/threaded
    http://www.securityfocus.com/archive/1/archive/1/538233/100/0/threaded
    http://www.securityfocus.com/bid/88264
    http://www.securitytracker.com/id/1035705
    http://www.talosintelligence.com/reports/TALOS-2016-0082/
    http://www.ubuntu.com/usn/USN-3096-1
    https://access.redhat.com/errata/RHSA-2016:1141
    https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
    https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
    https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
    https://security.gentoo.org/glsa/201607-15
    https://security.netapp.com/advisory/ntap-20171004-0002/
    https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
    https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
    https://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19
    https://www.debian.org/security/2016/dsa-3629
    https://www.kb.cert.org/vuls/id/718152
    https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0082

    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