The remote host is missing an update to sendmail announced via advisory DSA 1164-1. A programming error has been discovered in sendmail, an alternative mail transport agent for Debian, that could allow a remote attacker to crash the sendmail process by sending a specially crafted email message. Please note that in order to install this update you also need libsasl2 library from proposed updates as outlined in DSA 1155-2.

For the stable distribution (sarge) this problem has been fixed in version 8.13.3-3sarge3 For the unstable distribution (sid) this problem has been fixed in version 8.13.8-1 We recommend that you upgrade your sendmail package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201164-1