DEBIAN-CVE-2021-26720

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Source
https://security-tracker.debian.org/tracker/DEBIAN-CVE-2021-26720
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-26720.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2021-26720
Upstream
Published
2021-02-17T22:15:12Z
Modified
2025-09-19T06:22:03Z
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

Affected packages

Debian:11 / avahi

Package

Name
avahi
Purl
pkg:deb/debian/avahi?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.8-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / avahi

Package

Name
avahi
Purl
pkg:deb/debian/avahi?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.8-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / avahi

Package

Name
avahi
Purl
pkg:deb/debian/avahi?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.8-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / avahi

Package

Name
avahi
Purl
pkg:deb/debian/avahi?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.8-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}