CVE-2021-26720

avahi-daemon-check-dns.sh in the Debian avahi package through 0.8-4 is executed as root via /etc/network/if-up.d/avahi-daemon, and allows a local attacker to cause a denial of service or create arbitrary empty files via a symlink attack on files under /run/avahi-daemon. NOTE: this only affects the packaging for Debian GNU/Linux (used indirectly by SUSE), not the upstream Avahi product.

Link	Resource
https://packages.debian.org/buster/avahi-daemon	Product Third Party Advisory
https://packages.debian.org/sid/avahi-daemon	Product Third Party Advisory
https://metadata.ftp-master.debian.org/changelogs/main/a/avahi/avahi_0.8-4_changelog	Broken Link Third Party Advisory
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982796	Mailing List Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1180827	Issue Tracking Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2021-26720	Third Party Advisory
https://packages.debian.org/bullseye/avahi-daemon	Product Third Party Advisory
https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1870824	Issue Tracking Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/15/2	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html	Mailing List Third Party Advisory

Configuration 1

cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

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Published : 2021-02-17 10:15

Updated : 2022-12-06 09:52

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NVD link : CVE-2021-26720

Mitre link : CVE-2021-26720

No products.

CWE-59