A sudo security update has been released for Debian GNU/Linux 10 LTS to address an issue that allowed a local unprivileged user to perform arbitrary directory-existence tests.

DLA 3181-1: sudo security update

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Debian LTS Advisory DLA-3181-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Chris Lamb
November 07, 2022   https://wiki.debian.org/LTS
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Package : sudo
Version : 1.8.27-1+deb10u4
CVE ID : CVE-2021-23239

It was discovered that there was a information disclosure utility in
sudo, a tool used to provide limited superuser privileges to specific
users.

A local unprivileged user may have been able to perform arbitrary
directory-existence tests by exploiting a race condition in sudoedit.

For Debian 10 buster, this problem has been fixed in version
1.8.27-1+deb10u4.

We recommend that you upgrade your sudo packages.

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

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