Debian LTS Advisory DLA-2739-1                [email protected]
https://www.debian.org/lts/security/                      Markus Koschany
August 11, 2021                               https://wiki.debian.org/LTS

Package        : libspf2
Version        : 1.2.10-7+deb9u1
CVE ID         : CVE-2021-20314

Philipp Jeitner and Haya Shulman discovered a stack-based buffer
overflow in libspf2, a library for validating mail senders with SPF,
which could result in denial of service, or potentially execution of
arbitrary code when processing a specially crafted SPF record.

For Debian 9 stretch, this problem has been fixed in version

We recommend that you upgrade your libspf2 packages.

For the detailed security status of libspf2 please refer to
its security tracker page at:

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