The remote host is missing an update to sympa announced via advisory DSA 677-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20677-1

Erik Sjölund discovered that a support script of sympa, a mailing list manager, is running setuid sympa and vulnerable to a buffer overflow. This could potentially lead to the execution of arbitrary code under the sympa user id. For the stable distribution (woody) this problem has been fixed in version 3.3.3-3woody2. For the unstable distribution (sid) this problem will be fixed soon. We recommend that you upgrade your sympa package.