Summary
The remote host is missing an update as announced
via advisory SSA:2004-285-01.
Solution
https://secure1.securityspace.com/smysecure/catid.html?in=SSA:2004-285-01
Insight
New rsync 2.6.3 packages are available for Slackware 8.1, 9.0, 9.1, 10.0, and -current to a fix security issue when rsync is run as a non-chrooted server.
More details about this issue may be found in the Common Vulnerabilities and Exposures (CVE) database:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-792