USN-6584-2: Libspf2 vulnerabilities

Releases

• Ubuntu 16.04 ESM

Packages

• libspf2 - Sender Policy Framework for SMTP authorization

Details

USN-6584-1 fixed several vulnerabilities in Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS. This update provides the corresponding updates for
CVE-2021-33912 and CVE-2021-33913 in Ubuntu 16.04 LTS.

We apologize for the inconvenience.

Original advisory 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 16.04

• libmail-spf-xs-perl - 1.2.10-6ubuntu0.1~esm2
  Available with Ubuntu Pro
• libspf2-2 - 1.2.10-6ubuntu0.1~esm2
  Available with Ubuntu Pro
• libspf2-dev - 1.2.10-6ubuntu0.1~esm2
  Available with Ubuntu Pro
• spfquery - 1.2.10-6ubuntu0.1~esm2
  Available with Ubuntu Pro

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

References

• CVE-2021-33913
• CVE-2021-33912

Related notices

• USN-6584-1: libmail-spf-xs-perl, spfquery, libspf2-dev, libspf2-2, libspf2