QID 38871

Date Published: 2022-06-08

QID 38871: Network Time Protocol Multiple Security Vulnerabilities (ntp-4.2.8p14)

The following vulnerability exists in Network Time Protocol (ntp):

process_control() should bail earlier on short packets
Unauthenticated and unmonitored ntpd may be susceptible to IPv4 attack from highly predictable transmit timestamps
DoS Attack on Unauthenticated Client

QID Detection Logic (remote):
This QID reviews the NTP banner.

After 8 or more successful attacks in a row the attacker can either modify the victim's clock by a limited amount or cause ntpd to exit. This attack is most effective in cases where an unusually short poll interval is expressly configured on the victim's ntpd.

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as Medium - 5.8 severity.
    • Solution
    The vendor has released fixes to resolve these issues. Refer to ntp 4.2.8p14 to obtain additional details.

    Vendor References

    CVEs related to QID 38871

    CVE-2020-11868 | CVE-2020-13817 |
    Software Advisories
    Advisory ID Software Component Link
    NTP_4.2.8p14 URL Logo doc.ntp.org/support/securitynotice/
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