The remote host is missing an update to clamav announced via advisory DSA 1153-1. Damian Put discovered a heap overflow vulneravility in the UPX unpacker of the ClamAV anti-virus toolkit which could allow remote attackers to execute arbitrary code or cause denial of service.

For the stable distribution (sarge) this problem has been fixed in version 0.88.4-0volatile1 in the volatile archive. For the unstable distribution (sid) this problem has been fixed in version 0.88.4-2. We recommend that you upgrade your clamav packages. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201153-1