CVE-2021-26720

Name
CVE-2021-26720
Description
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.
NVD Severity
medium
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

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

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:* avahi >= None <= 0.8-4

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
avahi 3.10-main 0.7-r2 Natanael Copa <ncopa@alpinelinux.org> fixed
avahi 3.11-main 0.7-r5 Natanael Copa <ncopa@alpinelinux.org> fixed
avahi edge-main 0.8-r5 Natanael Copa <ncopa@alpinelinux.org> fixed
avahi 3.14-main 0.8-r5 Natanael Copa <ncopa@alpinelinux.org> fixed
avahi 3.13-main 0.8-r4 Natanael Copa <ncopa@alpinelinux.org> fixed
avahi 3.12-main 0.8-r4 Natanael Copa <ncopa@alpinelinux.org> fixed