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Ubuntu Security Notice USN-5328-2
March 15, 2022

openssl vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

OpenSSL could be made to stop responding if it opened a specially crafted
certificate.

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

Details:

USN-5328-1 fixed a vulnerability in OpenSSL. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

 Tavis Ormandy discovered that OpenSSL incorrectly parsed certain
 certificates. A remote attacker could possibly use this issue to cause
 OpenSSH to stop responding, resulting in a denial of service.

Update instructions:

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

Ubuntu 16.04 ESM:
  libssl1.0.0                     1.0.2g-1ubuntu4.20+esm2

Ubuntu 14.04 ESM:
  libssl1.0.0                     1.0.1f-1ubuntu2.27+esm5

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

References:
  https://ubuntu.com/security/notices/USN-5328-2
  https://ubuntu.com/security/notices/USN-5328-1
  CVE-2022-0778