The STARTTLS implementation in nnrpd in INN before 2.5.3 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.

Buffer overflow in INN 2.2.1 and earlier allows remote attackers to cause a denial of service via a maliciously formatted article.

Linux xmonisdn package allows local users to gain root privileges by modifying the IFS or PATH environmental variables.