Summary
The remote host is missing an update as announced
via advisory SSA:2004-223-03.
Solution
https://secure1.securityspace.com/smysecure/catid.html?in=SSA:2004-223-03
Insight
New sox packages are available for Slackware 8.1, 9.0, 9.1, 10.0, and -current to fix buffer overflow security issues that could allow a malicious WAV file to execute arbitrary code.