The remote host is missing an update to gzip announced via advisory DSA 588-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20588-1

Trustix developers discovered insecure temporary file creation in supplemental scripts in the gzip package which may allow local users to overwrite files via a symlink attack. For the stable distribution (woody) these problems have been fixed in version 1.3.2-3woody3. The unstable distribution (sid) is not affected by these problems. We recommend that you upgrade your gzip package.