Homepage
About Snyk

Link Following Affecting avahi package, versions <0.7-4+deb10u1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.04% (6th percentile)
Expand this section
NVD
7.8 high
Expand this section
SUSE
7.8 high

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk ID SNYK-DEBIAN10-AVAHI-1075017
  • published 16 Feb 2021
  • disclosed 17 Feb 2021
Report a new vulnerability Found a mistake?

Introduced: 16 Feb 2021

CVE-2021-26720 Open this link in a new tab
CWE-59 Open this link in a new tab

How to fix?

Upgrade Debian:10 avahi to version 0.7-4+deb10u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream avahi package and not the avahi package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

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.