[Debian] Medium CVE: CVE-2021-3468: avahi: trigger an infinite loop

[Yue Tao]

CVE-2021-3468: https://nvd.nist.gov/vuln/detail/CVE-2021-3468

A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered.

Base Score: Medium

Reference:

https://security-tracker.debian.org/tracker/CVE-2021-3468

['avahi-daemon_0.8-5_amd64.deb===>avahi-daemon_0.8-5+deb11u2_amd64.deb', 'libavahi-client3_0.8-5_amd64.deb===>libavahi-client3_0.8-5+deb11u2_amd64.deb', 'libavahi-common3_0.8-5_amd64.deb===>libavahi-common3_0.8-5+deb11u2_amd64.deb', 'libavahi-common-data_0.8-5_amd64.deb===>libavahi-common-data_0.8-5+deb11u2_amd64.deb', 'libavahi-core7_0.8-5_amd64.deb===>libavahi-core7_0.8-5+deb11u2_amd64.deb', 'libavahi-glib1_0.8-5_amd64.deb===>libavahi-glib1_0.8-5+deb11u2_amd64.deb']

[Ghada Khalil (gkhalil)]

Fixed by https://review.opendev.org/c/starlingx/tools/+/887350 which merged on July 11.