[USN-4938-1] Unbound vulnerabilities

========================================================================== Ubuntu Security Notice USN-4938-1 May 06, 2021
unbound vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Several security issues were fixed in Unbound.
Software Description: – unbound: validating, recursive, caching DNS resolver
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.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS: libunbound8 1.9.4-2ubuntu1.2 unbound 1.9.4-2ubuntu1.2
Ubuntu 18.04 LTS: libunbound2 1.6.7-1ubuntu2.4 unbound 1.6.7-1ubuntu2.4
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-4938-1 CVE-2019-25031, CVE-2019-25032, CVE-2019-25033, CVE-2019-25034, CVE-2019-25035, CVE-2019-25036, CVE-2019-25037, CVE-2019-25038, CVE-2019-25039, CVE-2019-25040, CVE-2019-25041, CVE-2019-25042, CVE-2020-28935
Package Information: launchpad.net/ubuntu/+source/unbound/1.9.4-2ubuntu1.2 launchpad.net/ubuntu/+source/unbound/1.6.7-1ubuntu2.4