Improper Data Handling Affecting ntp-doc 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
0.86% (83rd percentile)

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  • Snyk IDSNYK-RHEL7-NTPDOC-5127089
  • published26 Jul 2021
  • disclosed26 Apr 2016

Introduced: 26 Apr 2016

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

How to fix?

Upgrade RHEL:7 ntp-doc 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 ntp-doc package and not the ntp-doc package as distributed by RHEL. See How to fix? for RHEL:7 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

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