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    CVE-2023-4012

    ntpd will crash if the server is not NTS-enabled (no certificate) and it receives an NTS-enabled client request (mode 3).

    Published:Aug 7, 2023
    Last Modified:May 11, 2026
    EPS:Aug 7, 2023
    EPSS Score:0.002
    CVSS Score:7.5

    Affected Products

    Vendor
    Ntpsec
    Product
    Ntpsec

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-140 Bypassing of Intermediate Forms in Multiple-Form Sets
    CAPEC-74 Manipulating State

    Related CVEs

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    CVE-2021-22212 (CVSS 4) — ntpkeygen can generate keys that ntpd fails to parse. NTPsec 1.2.0 allows ntpkeygen to generate keys with '#' …
    CVE-2019-6444 (CVSS 9.1) — An issue was discovered in NTPsec before 1.1.3. process_control() in ntp_control.c has a stack-based buffer ov…
    CVE-2019-6443 (CVSS 9.1) — An issue was discovered in NTPsec before 1.1.3. Because of a bug in ctl_getitem, there is a stack-based buffer…
    CVE-2019-6445 (CVSS 6.5) — An issue was discovered in NTPsec before 1.1.3. An authenticated attacker can cause a NULL pointer dereference…
    CVE-2019-6442 (CVSS 6.5) — An issue was discovered in NTPsec before 1.1.3. An authenticated attacker can write one byte out of bounds in …
    CVE-2016-1551 (CVSS 3.7) — ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating sys…

    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