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AUSCERT External Security Bulletin Redistribution
ESB-2023.6876
USN-6487-1: Avahi vulnerabilities
21 November 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: Avahi
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2023-38473 CVE-2023-38472 CVE-2023-38471
CVE-2023-38470 CVE-2023-38469
Original Bulletin:
https://ubuntu.com/security/notices/USN-6487-1
Comment: CVSS (Max): 5.5 CVE-2023-38473 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: Ubuntu
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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USN-6487-1: Avahi vulnerabilities
20 November 2023
Avahi could be made to crash if it received specially crafted input.
Releases
o Ubuntu 23.10
o Ubuntu 23.04
o Ubuntu 22.04 LTS
o Ubuntu 20.04 LTS
o Ubuntu 18.04 ESM
o Ubuntu 16.04 ESM
o Ubuntu 14.04 ESM
Packages
o 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
o avahi-daemon - 0.8-10ubuntu1.1
o libavahi-client3 - 0.8-10ubuntu1.1
o libavahi-common3 - 0.8-10ubuntu1.1
o libavahi-core7 - 0.8-10ubuntu1.1
Ubuntu 23.04
o avahi-daemon - 0.8-6ubuntu1.23.04.2
o libavahi-client3 - 0.8-6ubuntu1.23.04.2
o libavahi-common3 - 0.8-6ubuntu1.23.04.2
o libavahi-core7 - 0.8-6ubuntu1.23.04.2
Ubuntu 22.04
o avahi-daemon - 0.8-5ubuntu5.2
o libavahi-client3 - 0.8-5ubuntu5.2
o libavahi-common3 - 0.8-5ubuntu5.2
o libavahi-core7 - 0.8-5ubuntu5.2
Ubuntu 20.04
o avahi-daemon - 0.7-4ubuntu7.3
o libavahi-client3 - 0.7-4ubuntu7.3
o libavahi-common3 - 0.7-4ubuntu7.3
o libavahi-core7 - 0.7-4ubuntu7.3
Ubuntu 18.04
o avahi-daemon - 0.7-3.1ubuntu1.3+esm2
Available with Ubuntu Pro
o libavahi-client3 - 0.7-3.1ubuntu1.3+esm2
Available with Ubuntu Pro
o libavahi-common3 - 0.7-3.1ubuntu1.3+esm2
Available with Ubuntu Pro
o libavahi-core7 - 0.7-3.1ubuntu1.3+esm2
Available with Ubuntu Pro
Ubuntu 16.04
o avahi-daemon - 0.6.32~rc+dfsg-1ubuntu2.3+esm3
Available with Ubuntu Pro
o libavahi-client3 - 0.6.32~rc+dfsg-1ubuntu2.3+esm3
Available with Ubuntu Pro
o libavahi-common3 - 0.6.32~rc+dfsg-1ubuntu2.3+esm3
Available with Ubuntu Pro
o libavahi-core7 - 0.6.32~rc+dfsg-1ubuntu2.3+esm3
Available with Ubuntu Pro
Ubuntu 14.04
o avahi-daemon - 0.6.31-4ubuntu1.3+esm3
Available with Ubuntu Pro
o libavahi-client3 - 0.6.31-4ubuntu1.3+esm3
Available with Ubuntu Pro
o libavahi-common3 - 0.6.31-4ubuntu1.3+esm3
Available with Ubuntu Pro
o 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
o CVE-2023-38469
o CVE-2023-38471
o CVE-2023-38472
o CVE-2023-38470
o CVE-2023-38473
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