The remote host is missing an update to hylafax announced via advisory DSA 933-1. Patrice Fournier found that hylafax passes unsanitized user data in the notify script, allowing users with the ability to submit jobs to run arbitrary commands with the privileges of the hylafax server. For the old stable distribution (woody) this problem has been fixed in version 4.1.1-4woody1.

For the stable distribution (sarge) this problem has been fixed in version 4.2.1-5sarge3. For the unstable distribution the problem has been fixed in version 4.2.4-2. We recommend that you upgrade your hylafax package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20933-1