Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

USN-4891-1: OpenSSL vulnerability

25 March 2021

OpenSSL could be made to crash if it received specially crafted network traffic.

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

Releases

Packages

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

Details

It was discovered that OpenSSL incorrectly handled certain renegotiation
ClientHello messages. A remote attacker could use this issue to cause
OpenSSL to crash, resulting in a denial of service.

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

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

References

Related notices

  • USN-5038-1: postgresql-client-10, libpq5, postgresql-doc-13, libpq-dev, postgresql-plpython3-10, postgresql-plpython-10, postgresql-plpython3-12, postgresql-plperl-10, postgresql-10, postgresql-server-dev-12, libecpg-dev, postgresql-13, postgresql-pltcl-10, postgresql-plpython3-13, postgresql-12, postgresql-client-13, postgresql-plperl-12, postgresql-doc-10, postgresql-doc-12, libpgtypes3, libecpg6, postgresql-pltcl-12, postgresql-pltcl-13, libecpg-compat3, postgresql-server-dev-13, postgresql-client-12, postgresql-server-dev-10, postgresql-plperl-13