1. Ubuntu Security Notices
  2. USN-4229-2

USN-4229-2: NTP vulnerability

Publication date

15 March 2021

Overview

NTP could be made to crash or run programs if it received specially crafted network traffic.

Releases

Packages

  • ntp - Network Time Protocol daemon and utility programs

Details

USN-4229-1 fixed a vulnerability in NTP. This update provides the
corresponding update for Ubuntu 18.04 ESM.

Original advisory details:

It was discovered that ntpq and ntpdc incorrectly handled some arguments.
An attacker could possibly use this issue to cause ntpq or ntpdc to crash,
execute arbitrary code, or escalate to higher privileges.

USN-4229-1 fixed a vulnerability in NTP. This update provides the
corresponding update for Ubuntu 18.04 ESM.

Original advisory details:

It was discovered that ntpq and ntpdc incorrectly handled some arguments.
An attacker could possibly use this issue to cause ntpq or ntpdc to crash,
execute arbitrary code, or escalate to higher privileges.

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
18.04 bionic ntp –  1:4.2.8p10+dfsg-5ubuntu7.3+esm1  
sntp –  1:4.2.8p10+dfsg-5ubuntu7.3+esm1  
ntpdate –  1:4.2.8p10+dfsg-5ubuntu7.3+esm1  

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References

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