Improper Data Handling Affecting ntp-perl package, versions <0:4.2.6p5-40.30.amzn1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.86% (83rd percentile)

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  • Snyk IDSNYK-AMZN201803-NTPPERL-1698731
  • published27 Sept 2021
  • disclosed6 Jan 2017

Introduced: 6 Jan 2017

CVE-2016-1548  (opens in a new tab)
CWE-19  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 ntp-perl to version 0:4.2.6p5-40.30.amzn1 or higher.
This issue was patched in ALAS-2016-708.

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.

An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer->dst timestamp recorded for that server. After making this switch, the client in NTP 4.2.8p4 and earlier and NTPSec aa48d001683e5b791a743ec9c575aaf7d867a2b0c will reject all future legitimate server responses. It is possible to force the victim client to move time after the mode has been changed. ntpq gives no indication that the mode has been switched.

References

CVSS Scores

version 3.1