==========================================================================
Ubuntu Security Notice USN-6584-1
January 15, 2024

libspf2 vulnerabilities
==========================================================================

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in Libspf2.

Software Description:
- libspf2: Sender Policy Framework for SMTP authorization

Details:

Philipp Jeitner and Haya Shulman discovered that Libspf2 incorrectly handled
certain inputs. If a user or an automated system were tricked into opening a
specially crafted input file, a remote attacker could possibly use this issue
to cause a denial of service or execute arbitrary code. (CVE-2021-20314)

It was discovered that Libspf2 incorrectly handled certain inputs. If a user or
an automated system were tricked into opening a specially crafted input file, a
remote attacker could possibly use this issue to cause a denial of service or
execute arbitrary code. This issue only affected Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS. (CVE-2021-33912, CVE-2021-33913)

Update instructions:

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

Ubuntu 20.04 LTS:
   libmail-spf-xs-perl             1.2.10-7+deb9u2build0.20.04.1
   libspf2-2                       1.2.10-7+deb9u2build0.20.04.1
   libspf2-dev                     1.2.10-7+deb9u2build0.20.04.1
   spfquery                        1.2.10-7+deb9u2build0.20.04.1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   libmail-spf-xs-perl             1.2.10-7ubuntu0.18.04.1~esm1
   libspf2-2                       1.2.10-7ubuntu0.18.04.1~esm1
   libspf2-dev                     1.2.10-7ubuntu0.18.04.1~esm1
   spfquery                        1.2.10-7ubuntu0.18.04.1~esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   libmail-spf-xs-perl             1.2.10-6ubuntu0.1~esm1
   libspf2-2                       1.2.10-6ubuntu0.1~esm1
   libspf2-dev                     1.2.10-6ubuntu0.1~esm1
   spfquery                        1.2.10-6ubuntu0.1~esm1

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

References:
   https://ubuntu.com/security/notices/USN-6584-1
   CVE-2021-20314, CVE-2021-33912, CVE-2021-33913

Package Information:
   https://launchpad.net/ubuntu/+source/libspf2/1.2.10-7+deb9u2build0.20.04.1