CVE-2021-26720
- Source
- https://cve.org/CVERecord?id=CVE-2021-26720
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-26720.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-26720
- Downstream
- Related
- Published
- 2021-02-17T22:15:12.710Z
- Modified
- 2026-02-13T08:43:53.977309Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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
-
- 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://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
- https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1870824
- https://bugzilla.suse.com/show_bug.cgi?id=1180827
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982796
- https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html
- https://www.openwall.com/lists/oss-security/2021/02/15/2
Affected packages
Git / github.com/flatpak/flatpak
Affected ranges
- Type
- GIT
- Repo
- https://github.com/flatpak/flatpak
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedLast affected
Affected versions
0.*
0.1
0.2
0.2.1
0.3
0.3.1
0.3.2
0.3.3
0.3.4
0.3.5
0.3.6
0.4.0
0.4.1
0.4.10
0.4.11
0.4.12
0.4.13
0.4.2
0.4.2.1
0.4.3
0.4.4
0.4.5
0.4.6
0.4.7
0.4.8
0.4.9
0.5.0
0.5.1
0.5.2
0.6.0
0.6.1
0.6.10
0.6.11
0.6.12
0.6.13
0.6.14
0.6.2
0.6.3
0.6.4
0.6.5
0.6.6
0.6.7
0.6.8
0.6.9
0.8.0
0.8.1
0.8.2
0.8.3
0.8.4