Microsoft Exchange Client Access Server Information Disclosure

high Nessus Plugin ID 77026
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The remote mail server is affected by an information disclosure vulnerability.


The 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.


Only attack two (Reverse Proxy / Gateway) is fixed in current versions. Apply the latest supplied vendor patches.

See Also

Plugin Details

Severity: High

ID: 77026

File Name: exchange_ip_disclosure.nasl

Version: 1.7

Type: remote

Agent: windows

Family: Windows

Published: 8/6/2014

Updated: 1/2/2019

Dependencies: http_version.nasl

Risk Information

CVSS Score Source: manual

CVSS Score Rationale: Nvd score unavailable. information disclosure vulnerability.


Risk Factor: Medium

Base Score: 5

Temporal Score: 4.2

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

Temporal Vector: E:U/RL:U/RC:ND


Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vulnerability Information

CPE: cpe:/a:microsoft:exchange_server

Exploit Ease: No known exploits are available

Exploited by Nessus: true

Vulnerability Publication Date: 8/1/2014

Reference Information

BID: 69018