The remote host is missing an update to the system as announced in the referenced advisory FreeBSD-SA-05:11.gzip.asc

Upgrade your system to the appropriate stable release or security branch dated after the correction date https://secure1.securityspace.com/smysecure/catid.html?in=FreeBSD-SA-05:11.gzip.asc

gzip is a file compression utility. Two problems related to extraction of files exist in gzip: The first problem is that gzip does not properly sanitize filenames containing / when uncompressing files using the -N command line option. The second problem is that gzip does not set permissions on newly extracted files until after the file has been created and the file descriptor has been closed.