CVE-2021-26720
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Avahi
PublishedFeb 17, 2021
First seenFeb 17, 2021
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| avahi avahi | v ≤ 0.8-4 | — |
| debian debian_linux | 9.0, 10.0 | — |
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