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.
References
Link | Resource |
---|---|
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982796 | Mailing List Third Party Advisory |
https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1870824 | Issue Tracking Third Party Advisory |
https://bugzilla.suse.com/show_bug.cgi?id=1180827 | Issue Tracking Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html | Mailing List Third Party Advisory |
https://metadata.ftp-master.debian.org/changelogs/main/a/avahi/avahi_0.8-4_changelog | Broken Link Third Party Advisory |
https://packages.debian.org/bullseye/avahi-daemon | Product Third Party Advisory |
https://packages.debian.org/buster/avahi-daemon | Product Third Party Advisory |
https://packages.debian.org/sid/avahi-daemon | Product Third Party Advisory |
https://security-tracker.debian.org/tracker/CVE-2021-26720 | Third Party Advisory |
https://www.openwall.com/lists/oss-security/2021/02/15/2 | Mailing List Third Party Advisory |
Configurations
History
06 Dec 2022, 21:52
Type | Values Removed | Values Added |
---|---|---|
References | (MLIST) https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html - Mailing List, Third Party Advisory |
07 Jun 2022, 21:15
Type | Values Removed | Values Added |
---|---|---|
References |
|
25 Feb 2021, 21:27
Type | Values Removed | Values Added |
---|---|---|
References | (MISC) https://packages.debian.org/sid/avahi-daemon - Product, Third Party Advisory | |
References | (MISC) https://bugzilla.suse.com/show_bug.cgi?id=1180827 - Issue Tracking, Third Party Advisory | |
References | (MISC) https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1870824 - Issue Tracking, Third Party Advisory | |
References | (MISC) https://www.openwall.com/lists/oss-security/2021/02/15/2 - Mailing List, Third Party Advisory | |
References | (MISC) https://metadata.ftp-master.debian.org/changelogs/main/a/avahi/avahi_0.8-4_changelog - Broken Link, Third Party Advisory | |
References | (MISC) https://security-tracker.debian.org/tracker/CVE-2021-26720 - Third Party Advisory | |
References | (MISC) https://packages.debian.org/buster/avahi-daemon - Product, Third Party Advisory | |
References | (MISC) https://packages.debian.org/bullseye/avahi-daemon - Product, Third Party Advisory | |
References | (MISC) https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982796 - Mailing List, Third Party Advisory | |
CWE | CWE-59 | |
CPE | cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
|
CVSS |
v2 : v3 : |
v2 : 4.6
v3 : 7.8 |
17 Feb 2021, 22:15
Type | Values Removed | Values Added |
---|---|---|
New CVE |
Information
Published : 2021-02-17 22:15
Updated : 2023-12-10 13:41
NVD link : CVE-2021-26720
Mitre link : CVE-2021-26720
CVE.ORG link : CVE-2021-26720
JSON object : View
Products Affected
debian
- debian_linux
avahi
- avahi
CWE
CWE-59
Improper Link Resolution Before File Access ('Link Following')