The remote host is missing an update to zlib announced via advisory DSA 740-1. An error in the way zlib handles the inflation of certain compressed files can cause a program which uses zlib to crash when opening an invalid file. This problem does not affect the old stable distribution (woody).

For the stable distribution (sarge), this problem has been fixed in version 1.2.2-4.sarge.1. For the unstable distribution, this problem has been fixed in version 1.2.2-7. We recommend that you upgrade your clamav package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20740-1