Ubuntu 5732-1: Unbound vulnerability | LinuxSecurity.com
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Ubuntu Security Notice USN-5732-1
November 17, 2022

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

- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Unbound could be made to stop responding if it received specially crafted
network traffic.

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

Details:

It was discovered that Unbound incorrectly handled delegations with a large
number of non-responsive nameservers. A remote attacker could possibly use
this issue to cause Unbound to consume resources, leading to a denial of
service.

Update instructions:

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

Ubuntu 22.10:
   libunbound8                     1.16.2-1ubuntu0.1
   unbound                         1.16.2-1ubuntu0.1

Ubuntu 22.04 LTS:
   libunbound8                     1.13.1-1ubuntu5.3
   unbound                         1.13.1-1ubuntu5.3

Ubuntu 20.04 LTS:
   libunbound8                     1.9.4-2ubuntu1.4
   unbound                         1.9.4-2ubuntu1.4

Ubuntu 18.04 LTS:
   libunbound2                     1.6.7-1ubuntu2.6
   unbound                         1.6.7-1ubuntu2.6

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

References:
   https://ubuntu.com/security/notices/USN-5732-1
   CVE-2022-3204

Package Information:
   https://launchpad.net/ubuntu/+source/unbound/1.16.2-1ubuntu0.1
   https://launchpad.net/ubuntu/+source/unbound/1.13.1-1ubuntu5.3
   https://launchpad.net/ubuntu/+source/unbound/1.9.4-2ubuntu1.4
   https://launchpad.net/ubuntu/+source/unbound/1.6.7-1ubuntu2.6

Ubuntu 5732-1: Unbound vulnerability

November 17, 2022

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.10 - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: Unbound could be made to stop responding if it received specially crafted network traffic. Software Description: - unbound: validating, recursive, caching DNS resolver Details: It was discovered that Unbound incorrectly handled delegations with a large number of non-responsive nameservers. A remote attacker could possibly use this issue to cause Unbound to consume resources, leading to a denial of service.

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 22.10: libunbound8 1.16.2-1ubuntu0.1 unbound 1.16.2-1ubuntu0.1 Ubuntu 22.04 LTS: libunbound8 1.13.1-1ubuntu5.3 unbound 1.13.1-1ubuntu5.3 Ubuntu 20.04 LTS: libunbound8 1.9.4-2ubuntu1.4 unbound 1.9.4-2ubuntu1.4 Ubuntu 18.04 LTS: libunbound2 1.6.7-1ubuntu2.6 unbound 1.6.7-1ubuntu2.6 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5732-1

CVE-2022-3204

Severity
Ubuntu Security Notice USN-5732-1

Package Information

https://launchpad.net/ubuntu/+source/unbound/1.16.2-1ubuntu0.1 https://launchpad.net/ubuntu/+source/unbound/1.13.1-1ubuntu5.3 https://launchpad.net/ubuntu/+source/unbound/1.9.4-2ubuntu1.4 https://launchpad.net/ubuntu/+source/unbound/1.6.7-1ubuntu2.6

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