This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--===============1097751755984607745==
Content-Language: en-US
Content-Type: multipart/signed; micalg=pgp-sha256;
 protocol="application/pgp-signature";
 boundary="------------5cGFdqQwZFkBr7MXZM6uwZVE"

This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--------------5cGFdqQwZFkBr7MXZM6uwZVE
Content-Type: multipart/mixed;
 boundary="------------090jXr4RhxiXxk9Xb0AVTlLK";
 protected-headers="v1"
From: Camila Camargo de Matos <camila.camargodematos@canonical.com>
Reply-To: security@ubuntu.com
To: ubuntu-security-announce@lists.ubuntu.com
Message-ID: <3e78289d-5d68-92c1-fead-ec8032d4ceba@canonical.com>
Subject: [USN-5334-1] man-db vulnerability
References: <20220317124654.79E3C26C2777@lillypilly.canonical.com>
In-Reply-To: <20220317124654.79E3C26C2777@lillypilly.canonical.com>

--------------090jXr4RhxiXxk9Xb0AVTlLK
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: base64

==========================================================================
Ubuntu Security Notice USN-5334-1
March 17, 2022

man-db vulnerability
==========================================================================

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

- Ubuntu 16.04 ESM

Summary:

man-db could be made to overwrite file and directory permissions.

Software Description:
- man-db: on-line manual pager

Details:

It was discovered that man-db incorrectly handled permission changing
operations in its daily cron job, and was therefore affected by a race
condition. An attacker could possibly use this issue to escalate privileges
and execute arbitrary code.

Update instructions:

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

Ubuntu 16.04 ESM:
man-db 2.7.5-1ubuntu0.1~esm1

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

References:
https://ubuntu.com/security/notices/USN-5334-1
CVE-2015-1336