Microsoft Exchange Client Access Server Information Disclosure
Medium Nessus Plugin ID 77026
SynopsisThe remote mail server is affected by an information disclosure vulnerability.
DescriptionThe Microsoft Exchange Client Access Server (CAS) is affected by an information disclosure vulnerability. A remote, unauthenticated attacker can exploit this vulnerability to learn the server's internal IP address.
An attacker can send a crafted GET request to the Web Server with an empty host header that would expose internal IP Addresses of the underlying system in the header response.
SolutionOnly attack two (Reverse Proxy / Gateway) is fixed in current versions. Apply the latest supplied vendor patches.