An OpenSSL security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, 21.10, and 22.04 LTS.

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Ubuntu Security Notice USN-5488-1
June 21, 2022

openssl, openssl1.0 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

OpenSSL could be made to crash or run programs when the c_rehash script is
used.

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

Details:

Chancen and Daniel Fiala discovered that OpenSSL incorrectly handled the
c_rehash script. A local attacker could possibly use this issue to execute
arbitrary commands when c_rehash is run.

Update instructions:

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

Ubuntu 22.04 LTS:
openssl 3.0.2-0ubuntu1.5

Ubuntu 21.10:
openssl 1.1.1l-1ubuntu1.5

Ubuntu 20.04 LTS:
openssl 1.1.1f-1ubuntu2.15

Ubuntu 18.04 LTS:
openssl 1.1.1-1ubuntu2.1~18.04.19
openssl1.0 1.0.2n-1ubuntu5.10

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5488-1
CVE-2022-2068

Package Information:
  https://launchpad.net/ubuntu/+source/openssl/3.0.2-0ubuntu1.5
  https://launchpad.net/ubuntu/+source/openssl/1.1.1l-1ubuntu1.5
  https://launchpad.net/ubuntu/+source/openssl/1.1.1f-1ubuntu2.15
  https://launchpad.net/ubuntu/+source/openssl/1.1.1-1ubuntu2.1~18.04.19
  https://launchpad.net/ubuntu/+source/openssl1.0/1.0.2n-1ubuntu5.10