cve-2021-26720
Vulnerability from cvelistv5
Published
2021-02-17 21:19
Modified
2024-08-03 20:33
Severity ?
Summary
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
cve@mitre.orghttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982796Mailing List, Third Party Advisory
cve@mitre.orghttps://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1870824Issue Tracking, Third Party Advisory
cve@mitre.orghttps://bugzilla.suse.com/show_bug.cgi?id=1180827Issue Tracking, Third Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2022/06/msg00009.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://metadata.ftp-master.debian.org/changelogs/main/a/avahi/avahi_0.8-4_changelogBroken Link, Third Party Advisory
cve@mitre.orghttps://packages.debian.org/bullseye/avahi-daemonProduct, Third Party Advisory
cve@mitre.orghttps://packages.debian.org/buster/avahi-daemonProduct, Third Party Advisory
cve@mitre.orghttps://packages.debian.org/sid/avahi-daemonProduct, Third Party Advisory
cve@mitre.orghttps://security-tracker.debian.org/tracker/CVE-2021-26720Third Party Advisory
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2021/02/15/2Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982796Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1870824Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.suse.com/show_bug.cgi?id=1180827Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2022/06/msg00009.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://metadata.ftp-master.debian.org/changelogs/main/a/avahi/avahi_0.8-4_changelogBroken Link, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://packages.debian.org/bullseye/avahi-daemonProduct, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://packages.debian.org/buster/avahi-daemonProduct, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://packages.debian.org/sid/avahi-daemonProduct, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security-tracker.debian.org/tracker/CVE-2021-26720Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2021/02/15/2Mailing List, Third Party Advisory
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

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List\",\"Third Party Advisory\"]},{\"url\":\"https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1870824\",\"source\":\"cve@mitre.org\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://bugzilla.suse.com/show_bug.cgi?id=1180827\",\"source\":\"cve@mitre.org\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://metadata.ftp-master.debian.org/changelogs/main/a/avahi/avahi_0.8-4_changelog\",\"source\":\"cve@mitre.org\",\"tags\":[\"Broken Link\",\"Third Party Advisory\"]},{\"url\":\"https://packages.debian.org/bullseye/avahi-daemon\",\"source\":\"cve@mitre.org\",\"tags\":[\"Product\",\"Third Party Advisory\"]},{\"url\":\"https://packages.debian.org/buster/avahi-daemon\",\"source\":\"cve@mitre.org\",\"tags\":[\"Product\",\"Third Party Advisory\"]},{\"url\":\"https://packages.debian.org/sid/avahi-daemon\",\"source\":\"cve@mitre.org\",\"tags\":[\"Product\",\"Third Party Advisory\"]},{\"url\":\"https://security-tracker.debian.org/tracker/CVE-2021-26720\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.openwall.com/lists/oss-security/2021/02/15/2\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982796\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1870824\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://bugzilla.suse.com/show_bug.cgi?id=1180827\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://metadata.ftp-master.debian.org/changelogs/main/a/avahi/avahi_0.8-4_changelog\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Broken Link\",\"Third Party Advisory\"]},{\"url\":\"https://packages.debian.org/bullseye/avahi-daemon\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Product\",\"Third Party Advisory\"]},{\"url\":\"https://packages.debian.org/buster/avahi-daemon\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Product\",\"Third Party Advisory\"]},{\"url\":\"https://packages.debian.org/sid/avahi-daemon\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Product\",\"Third Party Advisory\"]},{\"url\":\"https://security-tracker.debian.org/tracker/CVE-2021-26720\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.openwall.com/lists/oss-security/2021/02/15/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]}]}}",
   },
}


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UUIDv4 of the Vulnerability-Lookup instance
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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
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  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
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