USN-6791-1: Unbound vulnerability

28 May 2024

Unbound could be made to take part in a denial of service attack.

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Releases

Packages

  • unbound - validating, recursive, caching DNS resolver

Details

It was discovered that Unbound could take part in a denial of service
amplification attack known as DNSBomb. This update introduces certain
resource limits to make the impact from Unbound significantly lower.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 24.04
Ubuntu 23.10
Ubuntu 22.04
Ubuntu 20.04

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

References

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Further reading