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CVE-2021-26720

nvd nist
Published: Feb 17, 2021Modified: Nov 21, 2024

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7.8
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability: 1.8 / Impact: 5.9
Source: NVD

Description

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.

Affected (3)

Avahi
1 product
Avahi
Debian
1 product
Debian Linux
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Avahi
Up to 0.8-4
Configuration B
2 vulnerable
Vulnerable SoftwareAffected Versions
Debian
Debian Linux
Version 10.0
Debian Linux
Version 9.0

Related CWEs

CWE-59
Improper Link Resolution Before File Access ('Link Following')
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

References (20)

Source: cve@mitre.org
Mailing ListThird Party Advisory
Source: cve@mitre.org
Issue TrackingThird Party Advisory
Source: cve@mitre.org
Issue TrackingThird Party Advisory
Source: cve@mitre.org
Mailing ListThird Party Advisory
Source: cve@mitre.org
Broken LinkThird Party Advisory
Source: cve@mitre.org
ProductThird Party Advisory
Source: cve@mitre.org
ProductThird Party Advisory
Source: cve@mitre.org
ProductThird Party Advisory
Source: cve@mitre.org
Third Party Advisory
Source: cve@mitre.org
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Broken LinkThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
ProductThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
ProductThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
ProductThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory

Timeline

No history available yet.