VDB
CVE-2021-26720
CVE-2021-26720
PUBLISHED
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.
EPSS 0.09% · 25.5th percentile
Risk Scores
EPSS Score
0.09%
25.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:Pro:18.04:LTS | avahi | 0, 0.6.32-1ubuntu1, 0.7-3ubuntu2 |
| Ubuntu:Pro:16.04:LTS | avahi | 0, 0.6.31-4ubuntu4, 0.6.32~rc+dfsg-1ubuntu2.2 |
| Ubuntu:Pro:14.04:LTS | avahi | 0, 0.6.31-2ubuntu5, 0.6.31-3ubuntu1 |
Exploit Intelligence
- avahi.rb (github-poc)
- avahi.rb (github-poc)
- avahi.rb (github-poc)
- avahi.rb (github-poc)
- avahi.rb (github-poc)
- avahi.rb (github-poc)
- avahi.rb (github-poc)
- avahi.rb (github-poc)
- avahi.rb (github-poc)
- avahi.rb (github-poc)
…and 4 more exploits
Timeline
- Feb 17, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-26720 third-party-advisory
- https://www.openwall.com/lists/oss-security/2021/02/15/2 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-26720 third-party-advisory