USN-4563-2: NTP vulnerability

Releases

• Ubuntu 20.10
• Ubuntu 20.04 LTS

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).

Update instructions

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

Ubuntu 20.10

• 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

Ubuntu 20.04

• 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

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

References

• CVE-2019-8936

Related notices

• USN-4563-1: ntpdate, ntp, sntp, ntp-doc