The remote host is missing an update to the system as announced in the referenced advisory.
The following package is affected: php5-zip
CVE-2011-0421 The _zip_name_locate function in zip_name_locate.c in the Zip extension in PHP before 5.3.6 does not properly handle a ZIPARCHIVE::FL_UNCHANGED argument, which might allow context-dependent attackers to cause a denial of service (application crash) via an empty ZIP archive that is processed with a (1) locateName or (2) statName operation.
Solution: Update your system with the appropriate patches or software upgrades.