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USN-4662-1: OpenSSL vulnerability

8 December 2020

OpenSSL could be made to crash if it processed specially crafted input.



  • openssl - Secure Socket Layer (SSL) cryptographic library and tools
  • openssl1.0 - Secure Socket Layer (SSL) cryptographic library and tools


David Benjamin discovered that OpenSSL incorrectly handled comparing
certificates containing a EDIPartyName name type. A remote attacker could
possibly use this issue to cause OpenSSL to crash, resulting in a denial of

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

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


Related notices

  • USN-4745-1: libssl-doc, openssl, libssl-dev, libssl1.0.0, libcrypto1.0.0-udeb, libssl1.0.0-udeb