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Ubuntu 18.04 LTS: 4563-1 Critical: NTP Denial of Service Attack

ubuntu
Calendar Grey October 1, 2020
Dist Ubuntu Esm H88
A recent flaw in NTP could lead to system instability. Ensure you upgrade your Ubuntu 18.04 LTS immediately to implement essential fixes.
NTP could be made to crash.

Summary

NTP could be made to crash.

Software Description:

- ntp: Network Time Protocol daemon and utility programs

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).

Topics%20covered

Topics Covered

security advisory denial of service ubuntu ntp crash

Update Instructions

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

Ubuntu 18.04 LTS:
  ntp                             1:4.2.8p10+dfsg-5ubuntu7.3
  ntpdate                         1:4.2.8p10+dfsg-5ubuntu7.3
  sntp                            1:4.2.8p10+dfsg-5ubuntu7.3

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

References

https://ubuntu.com/security/notices/USN-4563-1

CVE-2019-8936

Severity
critical
Lowest
Low
Medium
High
Critical

October 01, 2020

Topics%20covered

Topics Covered

security advisory denial of service ubuntu ntp crash

Package Information

https://launchpad.net/ubuntu/+source/ntp/1:4.2.8p10+dfsg-5ubuntu7.3

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