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USN-4906-1: Nettle vulnerability

13 April 2021

Nettle could be made to crash or bypass signature verification if it opened a specially crafted certificate.

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Releases

Packages

  • nettle - low level cryptographic library

Details

It was discovered that Nettle incorrectly handled signature verification.
A remote attacker could use this issue to cause Nettle to crash, resulting
in a denial of service, or possibly force invalid signatures.

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 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

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

References

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Further reading