Improper Input Validation Affecting ntp package, versions <1:4.2.8p7+dfsg-1


Severity

Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment

    Threat Intelligence

    EPSS
    0.84% (83rd percentile)

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  • Snyk ID SNYK-DEBIAN11-NTP-530479
  • published 6 Jan 2017
  • disclosed 6 Jan 2017

How to fix?

Upgrade Debian:11 ntp to version 1:4.2.8p7+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.

An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.

CVSS Scores

version 3.1
Expand this section

Red Hat

4.3 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    Required
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    Low