An aide security update has been released for Debian GNU/Linux 9 LTS to address a heap-based buffer overflow vulnerability.

DLA 2894-1: aide security update

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Debian LTS Advisory DLA-2894-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
January 24, 2022   https://wiki.debian.org/LTS
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Package : aide
Version : 0.16-1+deb9u1
CVE ID : CVE-2021-45417

David Bouman discovered a heap-based buffer overflow vulnerability in
the base64 functions of aide, an advanced intrusion detection system,
which can be triggered via large extended file attributes or ACLs. This
may result in denial of service or privilege escalation.

For Debian 9 stretch, this problem has been fixed in version
0.16-1+deb9u1.

We recommend that you upgrade your aide packages.

For the detailed security status of aide please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/aide

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS