`add_password` in pam_radius_auth.c in pam_radius 1.4.0 does not correctly check the length of the input password, and is vulnerable to a stack-based buffer overflow during memcpy(). An attacker could send a crafted password to an application (loading the pam_radius library) and crash it. Arbitrary code execution might be possible, depending on the application, C library, compiler, and other factors.

For Debian 9 stretch, this problem has been fixed in version 1.3.16-5+deb9u1.

We recommend that you upgrade your libpam-radius-auth packages.

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

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