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    CVE-2015-1799

    The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer.

    Published:Apr 7, 2015
    Last Modified:Apr 12, 2025
    EPS:Apr 8, 2015
    EPSS Score:0.00922
    CVSS Score:4.3

    Affected Products

    Vendor
    Ntp
    Product
    Ntp
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    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://bugs.ntp.org/show_bug.cgi?id=2781
    http://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg00002.html
    http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html
    http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html
    http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html
    http://lists.opensuse.org/opensuse-updates/2015-04/msg00052.html
    http://marc.info/?l=bugtraq&m=143213867103400&w=2
    http://marc.info/?l=bugtraq&m=145750740530849&w=2
    http://rhn.redhat.com/errata/RHSA-2015-1459.html
    http://support.apple.com/kb/HT204942
    http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
    http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150408-ntpd
    http://tools.cisco.com/security/center/viewAlert.x?alertId=38275
    http://www.debian.org/security/2015/dsa-3222
    http://www.debian.org/security/2015/dsa-3223
    http://www.kb.cert.org/vuls/id/374268
    http://www.mandriva.com/security/advisories?name=MDVSA-2015:202
    http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
    http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
    http://www.securityfocus.com/bid/73950
    http://www.securitytracker.com/id/1032031
    http://www.ubuntu.com/usn/USN-2567-1
    https://kc.mcafee.com/corporate/index?page=content&id=SB10114
    https://security.gentoo.org/glsa/201509-01
    http://bugs.ntp.org/show_bug.cgi?id=2781
    http://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg00002.html
    http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html
    http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html
    http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html
    http://lists.opensuse.org/opensuse-updates/2015-04/msg00052.html
    http://marc.info/?l=bugtraq&m=143213867103400&w=2
    http://marc.info/?l=bugtraq&m=145750740530849&w=2
    http://rhn.redhat.com/errata/RHSA-2015-1459.html
    http://support.apple.com/kb/HT204942
    http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
    http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150408-ntpd
    http://tools.cisco.com/security/center/viewAlert.x?alertId=38275
    http://www.debian.org/security/2015/dsa-3222
    http://www.debian.org/security/2015/dsa-3223
    http://www.kb.cert.org/vuls/id/374268
    http://www.mandriva.com/security/advisories?name=MDVSA-2015:202
    http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
    http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
    http://www.securityfocus.com/bid/73950
    http://www.securitytracker.com/id/1032031
    http://www.ubuntu.com/usn/USN-2567-1
    https://kc.mcafee.com/corporate/index?page=content&id=SB10114
    https://security.gentoo.org/glsa/201509-01

    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