VDB
CVE-2021-26720
CVE-2021-26720
PUBLISHED
CVSS 7.800000190734863 HIGH
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 0.39% · 31.2th percentile
Risk Scores
CVSS 3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.39%
31.2th 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 |
Timeline
- Feb 17, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 25, 2021 EPSS Score
- Oct 27, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Mar 2, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 4, 2022 EPSS Score
- Jul 6, 2022 EPSS Score
- Sep 8, 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