OpenSSL Denial of Service Advisory USN-4662-1 For Ubuntu 20.10

ubuntu

December 8, 2020

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

Summary

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

Software Description:

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

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

Details:

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

service.

Topics Covered

security advisory Ubuntu OpenSSL update instructions Denial of Service

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
  libssl1.1                       1.1.1f-1ubuntu4.1

Ubuntu 20.04 LTS:
  libssl1.1                       1.1.1f-1ubuntu2.1

Ubuntu 18.04 LTS:
  libssl1.0.0                     1.0.2n-1ubuntu5.5
  libssl1.1                       1.1.1-1ubuntu2.1~18.04.7

Ubuntu 16.04 LTS:
  libssl1.0.0                     1.0.2g-1ubuntu4.18

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