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USN-6663-3: OpenSSL update

23 May 2024

Add implicit rejection in PKCS#1 v1.5 in OpenSSL.

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Releases

Packages

  • openssl - Secure Socket Layer (SSL) cryptographic library and tools

Details

USN-6663-1 provided a security update for OpenSSL.
This update provides the corresponding update for
Ubuntu 24.04 LTS.

Original advisory details:

As a security improvement, OpenSSL will now
return deterministic random bytes instead of an error
when detecting wrong padding in PKCS#1 v1.5 RSA
to prevent its use in possible Bleichenbacher timing attacks.

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

After a standard system update you need to reboot your computer to make
all the necessary changes.