[USN-6035-1] KAuth vulnerability

[Paulo Flabiano Smorigo]

==========================================================================
Ubuntu Security Notice USN-6035-1
April 20, 2023

kauth vulnerability
==========================================================================

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

- Ubuntu 18.04 ESM
- Ubuntu 16.04 ESM

Summary:

KAuth could be made to crash or run programs if it received specially crafted
input.

Software Description:
- kauth: Abstraction to system policy and authentication features

Details:

It was discovered that KAuth incorrectly handled some configuration parameters
with specially crafted arbitrary types. An attacker could possibly use this
issue to cause a denial of service, or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 18.04 ESM:
  libkf5auth-data                 5.44.0-0ubuntu1+esm1
  libkf5auth5                     5.44.0-0ubuntu1+esm1

Ubuntu 16.04 ESM:
  libkf5auth-data                 5.18.0-0ubuntu2+esm1
  libkf5auth5                     5.18.0-0ubuntu2+esm1

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

References:
  https://ubuntu.com/security/notices/USN-6035-1
  CVE-2019-7443
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