=========================================================================Ubuntu Security Notice USN-5569-1
August 16, 2022

unbound vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Unbound could be made to cache rogue domain names.

Software Description:
- unbound: validating, recursive, caching DNS resolver

Details:

Xiang Li discovered that Unbound incorrectly handled delegation caching.
A remote attacker could use this issue to keep rogue domain names
resolvable long after they have been revoked.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
  libunbound8                     1.13.1-1ubuntu5.1
  unbound                         1.13.1-1ubuntu5.1

Ubuntu 20.04 LTS:
  libunbound8                     1.9.4-2ubuntu1.3
  unbound                         1.9.4-2ubuntu1.3

Ubuntu 18.04 LTS:
  libunbound2                     1.6.7-1ubuntu2.5
  unbound                         1.6.7-1ubuntu2.5

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5569-1
  CVE-2022-30698, CVE-2022-30699

Package Information:
  https://launchpad.net/ubuntu/+source/unbound/1.13.1-1ubuntu5.1
  https://launchpad.net/ubuntu/+source/unbound/1.9.4-2ubuntu1.3
  https://launchpad.net/ubuntu/+source/unbound/1.6.7-1ubuntu2.5

Ubuntu 5569-1: Unbound vulnerabilities

August 16, 2022
Unbound could be made to cache rogue domain names.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: libunbound8 1.13.1-1ubuntu5.1 unbound 1.13.1-1ubuntu5.1 Ubuntu 20.04 LTS: libunbound8 1.9.4-2ubuntu1.3 unbound 1.9.4-2ubuntu1.3 Ubuntu 18.04 LTS: libunbound2 1.6.7-1ubuntu2.5 unbound 1.6.7-1ubuntu2.5 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5569-1

CVE-2022-30698, CVE-2022-30699

Severity
August 16, 2022

Package Information

https://launchpad.net/ubuntu/+source/unbound/1.13.1-1ubuntu5.1 https://launchpad.net/ubuntu/+source/unbound/1.9.4-2ubuntu1.3 https://launchpad.net/ubuntu/+source/unbound/1.6.7-1ubuntu2.5

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