Improper Input Validation Affecting ntp package, versions <1:4.2.8p14+dfsg-1


Severity

Recommended
low

Based on Debian security rating

    Threat Intelligence

    EPSS
    5.9% (94th percentile)

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  • Snyk ID SNYK-DEBIAN11-NTP-571409
  • published 4 Jun 2020
  • disclosed 4 Jun 2020

How to fix?

Upgrade Debian:11 ntp to version 1:4.2.8p14+dfsg-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ntp package and not the ntp package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service (daemon exit or system time change) by predicting transmit timestamps for use in spoofed packets. The victim must be relying on unauthenticated IPv4 time sources. There must be an off-path attacker who can query time from the victim's ntpd instance.

CVSS Scores

version 3.1
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NVD

7.4 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    High
  • Availability (A)
    High
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SUSE

5.9 medium
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Red Hat

7.4 high