The remote host is missing an update to the system as announced in the referenced advisory.
The following package is affected: libsndfile
CVE-2011-2696 Integer overflow in libsndfile before 1.0.25 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted PARIS Audio Format (PAF) file that triggers a heap-based buffer overflow.
Solution: Update your system with the appropriate patches or software upgrades.