Time and State Affecting ntp-perl package, versions <0:4.2.6p5-34.27.amzn1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
36.12% (98th percentile)

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  • Snyk IDSNYK-AMZN201803-NTPPERL-1691665
  • published27 Sept 2021
  • disclosed21 Jul 2017

Introduced: 21 Jul 2017

CVE-2015-5300  (opens in a new tab)
CWE-361  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 ntp-perl to version 0:4.2.6p5-34.27.amzn1 or higher.
This issue was patched in ALAS-2015-607.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ntp-perl package and not the ntp-perl package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

The panic_gate check in NTP before 4.2.8p5 is only re-enabled after the first change to the system clock that was greater than 128 milliseconds by default, which allows remote attackers to set NTP to an arbitrary time when started with the -g option, or to alter the time by up to 900 seconds otherwise by responding to an unspecified number of requests from trusted sources, and leveraging a resulting denial of service (abort and restart).

References

CVSS Scores

version 3.1