USN-6487-1: Avahi vulnerabilities

Releases

• Ubuntu 23.10
• Ubuntu 23.04
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• avahi - IPv4LL network address configuration daemon

Details

Evgeny Vereshchagin discovered that Avahi contained several reachable
assertions, which could lead to intentional assertion failures when
specially crafted user input was given. An attacker could possibly use
this issue to cause a denial of service. (CVE-2023-38469, CVE-2023-38470,
CVE-2023-38471, CVE-2023-38472, CVE-2023-38473)

Update instructions

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

Ubuntu 23.10

• avahi-daemon - 0.8-10ubuntu1.1
• libavahi-client3 - 0.8-10ubuntu1.1
• libavahi-common3 - 0.8-10ubuntu1.1
• libavahi-core7 - 0.8-10ubuntu1.1

Ubuntu 23.04

• avahi-daemon - 0.8-6ubuntu1.23.04.2
• libavahi-client3 - 0.8-6ubuntu1.23.04.2
• libavahi-common3 - 0.8-6ubuntu1.23.04.2
• libavahi-core7 - 0.8-6ubuntu1.23.04.2

Ubuntu 22.04

• avahi-daemon - 0.8-5ubuntu5.2
• libavahi-client3 - 0.8-5ubuntu5.2
• libavahi-common3 - 0.8-5ubuntu5.2
• libavahi-core7 - 0.8-5ubuntu5.2

Ubuntu 20.04

• avahi-daemon - 0.7-4ubuntu7.3
• libavahi-client3 - 0.7-4ubuntu7.3
• libavahi-common3 - 0.7-4ubuntu7.3
• libavahi-core7 - 0.7-4ubuntu7.3

Ubuntu 18.04

• avahi-daemon - 0.7-3.1ubuntu1.3+esm2
  Available with Ubuntu Pro
• libavahi-client3 - 0.7-3.1ubuntu1.3+esm2
  Available with Ubuntu Pro
• libavahi-common3 - 0.7-3.1ubuntu1.3+esm2
  Available with Ubuntu Pro
• libavahi-core7 - 0.7-3.1ubuntu1.3+esm2
  Available with Ubuntu Pro

Ubuntu 16.04

• avahi-daemon - 0.6.32~rc+dfsg-1ubuntu2.3+esm3
  Available with Ubuntu Pro
• libavahi-client3 - 0.6.32~rc+dfsg-1ubuntu2.3+esm3
  Available with Ubuntu Pro
• libavahi-common3 - 0.6.32~rc+dfsg-1ubuntu2.3+esm3
  Available with Ubuntu Pro
• libavahi-core7 - 0.6.32~rc+dfsg-1ubuntu2.3+esm3
  Available with Ubuntu Pro

Ubuntu 14.04

• avahi-daemon - 0.6.31-4ubuntu1.3+esm3
  Available with Ubuntu Pro
• libavahi-client3 - 0.6.31-4ubuntu1.3+esm3
  Available with Ubuntu Pro
• libavahi-common3 - 0.6.31-4ubuntu1.3+esm3
  Available with Ubuntu Pro
• libavahi-core7 - 0.6.31-4ubuntu1.3+esm3
  Available with Ubuntu Pro

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

References

• CVE-2023-38469
• CVE-2023-38471
• CVE-2023-38472
• CVE-2023-38470
• CVE-2023-38473