=========================================================================Ubuntu Security Notice USN-5243-1
January 20, 2022

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

- Ubuntu 21.10
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

AIDE could be made to crash or run programs as an administrator if it
opened a specially crafted file.

Software Description:
- aide: Advanced Intrusion Detection Environment

Details:

David Bouman discovered that AIDE incorrectly handled base64 operations. A
local attacker could use this issue to cause AIDE to crash, resulting in 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 21.10:
  aide                            0.17.3-4ubuntu0.1

Ubuntu 21.04:
  aide                            0.17.3-1ubuntu0.1

Ubuntu 20.04 LTS:
  aide                            0.16.1-1ubuntu0.1

Ubuntu 18.04 LTS:
  aide                            0.16-3ubuntu0.1

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

References:
  
  CVE-2021-45417

Package Information:
  https://launchpad.net/ubuntu/+source/aide/0.17.3-4ubuntu0.1
  https://launchpad.net/ubuntu/+source/aide/0.17.3-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/aide/0.16.1-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/aide/0.16-3ubuntu0.1