Code Affecting ntp-perl package, versions <0:4.2.6p5-30.24.amzn1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.57% (78th percentile)

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  • Snyk IDSNYK-AMZN201803-NTPPERL-1685249
  • published27 Sept 2021
  • disclosed8 Apr 2015

Introduced: 8 Apr 2015

CVE-2015-1798  (opens in a new tab)
CWE-17  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 ntp-perl to version 0:4.2.6p5-30.24.amzn1 or higher.
This issue was patched in ALAS-2015-520.

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 symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.

References

CVSS Scores

version 3.1