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Ubuntu 18.10, 18.04 LTS USN-3876-1: Avahi Critical DoS Issue

ubuntu
Calendar Grey January 31, 2019
Dist Ubuntu Esm H88
=========================================================================Ubuntu Security Notice USN-
Several security issues were fixed in Avahi.

Summary

Several security issues were fixed in Avahi.

Software Description:

- avahi: Avahi IPv4LL network address configuration daemon

Details:

Chad Seaman discovered that Avahi incorrectly handled certain messages.

An attacker could possibly use this issue to cause a denial of service.

(CVE-2017-6519, CVE-2018-1000845)

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu software fix update instructions Avahi

Update Instructions

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

Ubuntu 18.10:
  avahi-daemon                    0.7-4ubuntu2.1
  libavahi-core7                  0.7-4ubuntu2.1

Ubuntu 18.04 LTS:
  avahi-daemon                    0.7-3.1ubuntu1.2
  libavahi-core7                  0.7-3.1ubuntu1.2

Ubuntu 16.04 LTS:
  avahi-daemon                    0.6.32~rc+dfsg-1ubuntu2.3
  libavahi-core7                  0.6.32~rc+dfsg-1ubuntu2.3

Ubuntu 14.04 LTS:
  avahi-daemon                    0.6.31-4ubuntu1.3
  libavahi-core7                  0.6.31-4ubuntu1.3

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

References

  https://ubuntu.com/security/notices/USN-3876-1

  CVE-2017-6519, CVE-2018-1000845

Severity
critical
Lowest
Low
Medium
High
Critical

January 31, 2019

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu software fix update instructions Avahi

Package Information

  https://launchpad.net/ubuntu/+source/avahi/0.7-4ubuntu2.1
  https://launchpad.net/ubuntu/+source/avahi/0.7-3.1ubuntu1.2
  https://launchpad.net/ubuntu/+source/avahi/0.6.32~rc+dfsg-1ubuntu2.3
  https://launchpad.net/ubuntu/+source/avahi/0.6.31-4ubuntu1.3

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