CVE-2021-26720
Severity CVSS v4.0:
Pending analysis
Type:
CWE-59
Link Following
Publication date:
17/02/2021
Last modified:
06/12/2022
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.
Impact
Base Score 3.x
7.80
Severity 3.x
HIGH
Base Score 2.0
4.60
Severity 2.0
MEDIUM
Vulnerable products and versions
CPE | From | Up to |
---|---|---|
cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:* | 0.8-4 (including) | |
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | ||
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982796
- https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1870824
- https://bugzilla.suse.com/show_bug.cgi?id=1180827
- https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html
- https://metadata.ftp-master.debian.org/changelogs/main/a/avahi/avahi_0.8-4_changelog
- https://packages.debian.org/bullseye/avahi-daemon
- https://packages.debian.org/buster/avahi-daemon
- https://packages.debian.org/sid/avahi-daemon
- https://security-tracker.debian.org/tracker/CVE-2021-26720
- https://www.openwall.com/lists/oss-security/2021/02/15/2