VDB
DEBIAN-CVE-2021-26720
DEBIAN-CVE-2021-26720
PUBLISHED
CVSS 7.800000190734863 HIGH
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.
Risk Scores
CVSS v3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | avahi | 0, 0, 0 |
| Debian:11 | avahi | 0, 0, 0 |
| Debian:13 | avahi | 0, 0, 0 |
| Debian:14 | avahi | 0, 0, 0 |
Timeline
- Feb 17, 2021 CVE Published
- Apr 28, 2026 CVE Updated