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    CVE-2015-1798

    The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.

    Published:Apr 7, 2015
    Last Modified:Apr 12, 2025
    EPS:Apr 8, 2015
    EPSS Score:0.00919
    CVSS Score:1.8

    Affected Products

    Vendor
    Ntp
    Product
    Ntp
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-463 Padding Oracle Crypto Attack
    CAPEC-475 Signature Spoofing by Improper Validation

    Related CVEs

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    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=2779
    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://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=38276
    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/73951
    http://www.securitytracker.com/id/1032032
    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=2779
    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://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=38276
    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/73951
    http://www.securitytracker.com/id/1032032
    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