Quoting from CA-1997-08:
Remote, unauthorized users can execute arbitrary commands on the system
with the same privileges as the innd (INN daemon) process. Attacks may
reach news servers located behind Internet firewalls.
Versions of INN prior to 1.5.1 are vulnerable.
The Debian entry from CA-1997-08:
The current version of INN shipped with Debian is 1.4unoff4.
However the "unstable" (or development) tree contains inn-1.5.1.
References: