The remote host is missing an update to the system as announced in the referenced advisory.
The following packages are affected: mpg123 mpg123-nas mpg123-esound
CVE-2004-0805 Buffer overflow in layer2.c in mpg123 0.59r and possibly mpg123 0.59s allows remote attackers to execute arbitrary code via a certain (1) mp3 or (2) mp2 file.
Solution: Update your system with the appropriate patches or software upgrades.