USN-4662-1: OpenSSL vulnerability

Releases

• Ubuntu 20.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• 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.

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

• libssl1.1 - 1.1.1f-1ubuntu2.1

Ubuntu 18.04

• libssl1.0.0 - 1.0.2n-1ubuntu5.5
• libssl1.1 - 1.1.1-1ubuntu2.1~18.04.7

Ubuntu 16.04

• 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.

References

• CVE-2020-1971

Related notices

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