ALPINE-CVE-2021-26720

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Source
https://security.alpinelinux.org/vuln/CVE-2021-26720
Import Source
https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json
JSON Data
https://api.osv.dev/v1/vulns/ALPINE-CVE-2021-26720
Upstream
Published
2021-02-17T22:15:12.710Z
Modified
2025-12-03T22:48:27.661016Z
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
Alpine:v3.22
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"
Alpine:v3.23
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-26720.json"