Improper Input Validation Affecting ntpdate package, versions <0:4.2.6p5-22.el7_2.2


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.9% (83rd percentile)

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  • Snyk IDSNYK-RHEL7-NTPDATE-5129290
  • published26 Jul 2021
  • disclosed26 Apr 2016

Introduced: 26 Apr 2016

CVE-2016-1547  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade RHEL:7 ntpdate to version 0:4.2.6p5-22.el7_2.2 or higher.
This issue was patched in RHSA-2016:1141.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ntpdate package and not the ntpdate package as distributed by RHEL. See How to fix? for RHEL:7 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