The remote host is missing an update to freetype announced via advisory DSA 1454-1.
Greg MacManus discovered an integer overflow in the font handling of libfreetype, a FreeType 2 font engine, which might lead to denial of service or possibly the execution of arbitrary code if a user is tricked into opening a malformed font.
For the unstable distribution (sid), this problem has been fixed in version 2.3.5-1.
For the stable distribution (etch), this problem has been fixed in version 2.2.1-5+etch2.
For the old stable distribution (sarge) this problem will be fixed soon.
We recommend that you upgrade your freetype packages.