It was discovered that Unbound contained multiple security issues. A
remote attacker could possibly use these issues to cause a denial of
service, inject arbitrary commands, execute arbitrary code, and overwrite
local files.
ubuntu.com/security/CVE-2019-25031
ubuntu.com/security/CVE-2019-25032
ubuntu.com/security/CVE-2019-25033
ubuntu.com/security/CVE-2019-25034
ubuntu.com/security/CVE-2019-25035
ubuntu.com/security/CVE-2019-25036
ubuntu.com/security/CVE-2019-25037
ubuntu.com/security/CVE-2019-25038
ubuntu.com/security/CVE-2019-25039
ubuntu.com/security/CVE-2019-25040
ubuntu.com/security/CVE-2019-25041
ubuntu.com/security/CVE-2019-25042
ubuntu.com/security/CVE-2020-28935
ubuntu.com/security/notices/USN-4938-1