1. Ubuntu Security Notices
  2. USN-4563-2

USN-4563-2: NTP vulnerability

Publication date

20 April 2021

Overview

NTP could be made to crash.

Releases

Packages

  • ntp - Network Time Protocol daemon and utility programs

Details

USN-4563-1 fixed a vulnerability in NTP. This update provides the
corresponding update for Ubuntu 20.04 LTS and Ubuntu 20.10.

Original advisory details:

It was discovered that the fix for CVE-2018-7182 introduced a NULL pointer
dereference into NTP. An attacker could use this vulnerability to cause a
denial of service (crash).

USN-4563-1 fixed a vulnerability in NTP. This update provides the
corresponding update for Ubuntu 20.04 LTS and Ubuntu 20.10.

Original advisory details:

It was discovered that the fix for CVE-2018-7182 introduced a NULL pointer
dereference into NTP. An attacker could use this vulnerability to cause a
denial of service (crash).

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
20.10 groovy ntp –  1:4.2.8p12+dfsg-3ubuntu4.20.10.1
ntpdate –  1:4.2.8p12+dfsg-3ubuntu4.20.10.1
sntp –  1:4.2.8p12+dfsg-3ubuntu4.20.10.1
20.04 focal ntp –  1:4.2.8p12+dfsg-3ubuntu4.20.04.1
ntpdate –  1:4.2.8p12+dfsg-3ubuntu4.20.04.1
sntp –  1:4.2.8p12+dfsg-3ubuntu4.20.04.1

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References

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