CVE-2021-26720

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Source

https://nvd.nist.gov/vuln/detail/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

Related

Published

2021-02-17T22:15:12Z

Modified

2024-12-05T14:00:05Z

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

Affected packages

Alpine:v3.10 / avahi

Package

Name: avahi
Purl: pkg:apk/alpine/avahi?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0

Alpine:v3.11 / avahi

Package

Name: avahi
Purl: pkg:apk/alpine/avahi?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0

Alpine:v3.12 / avahi

Package

Name: avahi
Purl: pkg:apk/alpine/avahi?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0

Alpine:v3.13 / avahi

Package

Name: avahi
Purl: pkg:apk/alpine/avahi?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0

Alpine:v3.14 / avahi

Package

Name: avahi
Purl: pkg:apk/alpine/avahi?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0

Alpine:v3.15 / avahi

Package

Name: avahi
Purl: pkg:apk/alpine/avahi?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0

Alpine:v3.16 / avahi

Package

Name: avahi
Purl: pkg:apk/alpine/avahi?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0

Alpine:v3.17 / avahi

Package

Name: avahi
Purl: pkg:apk/alpine/avahi?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0

Alpine:v3.18 / avahi

Package

Name: avahi
Purl: pkg:apk/alpine/avahi?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0

Alpine:v3.19 / avahi

Package

Name: avahi
Purl: pkg:apk/alpine/avahi?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0

Alpine:v3.20 / avahi

Package

Name: avahi
Purl: pkg:apk/alpine/avahi?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0

Alpine:v3.21 / avahi

Package

Name: avahi
Purl: pkg:apk/alpine/avahi?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0

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"
}