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Link Following Affecting avahi package, versions *

low

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

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

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  • Snyk ID SNYK-UBUNTU1404-AVAHI-1076781
  • published 19 Feb 2021
  • disclosed 17 Feb 2021
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Introduced: 17 Feb 2021

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

How to fix?

There is no fixed version for Ubuntu:14.04 avahi.

NVD Description

Note: Versions mentioned in the description apply only to the upstream avahi package and not the avahi package as distributed by Ubuntu. See How to fix? for Ubuntu:14.04 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.