A libpam-krb5 security update has been released for both Debian GNU/Linux 9 and 10 to address a buffer overflow in the PAM module for MIT Kerberos.

DSA 4648-1: libpam-krb5 security update

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Debian Security Advisory DSA-4648-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
March 31, 2020   https://www.debian.org/security/faq
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Package : libpam-krb5
CVE ID : CVE-2020-10595

Russ Allbery discovered a buffer overflow in the PAM module for MIT
Kerberos, which could result in denial of service or potentially the
execution of arbitrary code.

For the oldstable distribution (stretch), this problem has been fixed
in version 4.7-4+deb9u1.

For the stable distribution (buster), this problem has been fixed in
version 4.8-2+deb10u1.

We recommend that you upgrade your libpam-krb5 packages.

For the detailed security status of libpam-krb5 please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/libpam-krb5

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/