The remote host is missing an update to xsane announced via advisory DSA 118-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20118-1

Tim Waugh found several insecure uses of temporary files in the xsane program, which is used for scanning. This was fixed for Debian/stable by moving those files into a securely created directory within the /tmp directory. This problem has been fixed in version 0.50-5.1 for the stable Debian distribution and in version 0.84-0.1 for the testing and unstable distribution of Debian. We recommend that you upgrade your xsane package.