The remote FreeBSD host is missing a security-related update.
oCERT reports : The UnZip tool is an open source extraction utility for archives compressed in the zip format. The unzip command line tool is affected by heap-based buffer overflows within the CRC32 verification, the test_compr_eb() and the getZip64Data() functions. The input errors may result in arbitrary code execution. A specially crafted zip file, passed to unzip -t, can be used to trigger the vulnerability.