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Ubuntu Security Notice USN-5243-2
January 20, 2022

aide 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:

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 - static binary

Details:

USN-5243-1 fixed a vulnerability in aide. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.


Original advisory 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 16.04 ESM:
  aide                            0.16~a2.git20130520-3ubuntu0.1~esm1

Ubuntu 14.04 ESM:
  aide                            0.16~a2.git20130520-2ubuntu0.1+esm1

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

References:
  https://ubuntu.com/security/notices/USN-5243-2
  https://ubuntu.com/security/notices/USN-5243-1
  CVE-2021-45417