USN-4891-1: OpenSSL vulnerability

25 March 2021

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

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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

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Further reading