CWE
835
Advisory Published
CVE Published
Updated

CVE-2021-3468

First published: Wed Mar 10 2021(Updated: )

A flaw was found in avahi deamon. Denial of service can be triggered by writing long lines to /run/avahi-daemon/socket resulting in an unresponsive busy-loop of the daemon. References: <a href="https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=984938">https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=984938</a>

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Avahi Avahi>=0.6<=0.8
Debian Debian Linux=9.0
debian/avahi<=0.7-4<=0.8-5
0.8-7
0.8-5+deb11u2
debian/avahi
0.8-5+deb11u2
0.8-10
0.8-13

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Frequently Asked Questions

  • What is CVE-2021-3468?

    CVE-2021-3468 is a vulnerability found in avahi versions 0.6 up to 0.8 where a flaw in how the termination of the client connection on the avahi Unix socket is handled can allow a local attacker to trigger an infinite loop.

  • What is the severity of CVE-2021-3468?

    The severity of CVE-2021-3468 is medium with a CVSS v3 base score of 5.5.

  • Which software versions of avahi are affected?

    Versions 0.6 up to 0.8 of avahi are affected by CVE-2021-3468.

  • How can a local attacker exploit CVE-2021-3468?

    A local attacker can exploit CVE-2021-3468 by triggering an infinite loop through the mishandling of the client connection termination event on the avahi Unix socket.

  • Are there any fixes or patches available for CVE-2021-3468?

    Yes, there are fixes and patches available for CVE-2021-3468. It is recommended to update to a version of avahi that is not affected by this vulnerability.

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