The private IP addresses disclosure such as QID 86247 Web Server Internal IP AddressInternal Network Name Disclosure Vulnerability will be marked as a Fail for PCI from February 1 2018 in accordance with PCI DSS v32. Read on to learn how.
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Web server internal ip address internal network name disclosure vulnerability. There is a known issue with Microsoft IIS 40 doing this in its default configuration. Private IP addresses disclosure such as QID 86247 Web Server Internal IP AddressInternal Network Name Disclosure Vulnerability will be marked as a Fail for PCI as of February 1 2018 in accordance with PCI DSS v32. But only the server name is not enough for this type of vulnerability.
PCI DSS 32 requirement 137 do not disclose private IP addresses and routing information to unauthorized parties. The first attribute which we need to set is server_name. SF_NOTIFY_PREPROC_HEADERS notifications occur for each request.
MS IIS receives a GET request without a host header the Web server will reveal the IP address of the. Categorized as a CWE-200 ISO27001-A1814 OWASP 2013-A6 OWASP 2017-A3 vulnerability companies or developers should remedy the situation when possible to avoid further problems. There is not usually any good reason to disclose the internal IP addresses used within an organizations infrastructure.
This recent issue has been publicly disclosed on 812014 and covers multiple issues that can allow a specially crafted GET request using HTTP 10 web request to a server that with that empty host headers and empty domainrealm basic authentication fields to obtain internal addresses of the client network. MS IIS Internal IP AddressInternal Network Name Disclosure Vulnerability A vulnerability has been discovered in Microsoft IIS that may disclose the internal IP address or internal network name to remote attackers. Typically this is done by sending a blank host header which can result in the server sending a redirect using its own IP address as the host name.
An example configuration is provided below. This includes internal IP addresses or host names of the web server queried. QID 86247 is a PCI Fail according to PCI DSS v32 Requirement 137.
In some cases specially crafted queries may be used to expose internal IP addresses. This may expose internal IP addresses that are usually hidden or masked behind a Network Address Translation NAT Firewall or proxy server. Server in the content-location field or the location field in the TCP header in the response.
If these are being returned in service banners or debug messages then the relevant services should be configured to mask the private addresses. Microsoft IIS Internal IP Address Disclosure Vulnerability. How to Fix Web Server Internal IP AddressInternal Network Name Disclosure Vulnerability.
Successful exploitation will allow remote attackers to gain internal IP. Web servers may be configured to send redirects to client requests. A Internal IP Address Disclosure is an attack that is similar to a Blind Cross-site Scripting that low-level severity.
This vulnerability can be exploited if an attacker connects to a host using HTTPS typically on port 443 and crafts a specially formed GET request. Run the commands adsutil set w3svcUseHostName True net stop iisadmin y net start w3svc. This is a PCI Fail since confidential information about your network is leaked.
The reasons for failing PCI compliance. The QID is flagged if a Content-location header or a 3xx redirect address in an HTTP response contains an RFC1918 IP address. Microsoft IIS Internal IP Address Disclosure Vulnerability When a remote user attempts to access an area protected by basic authentication with no realm defined while specifying HTTP 10 Microsoft IIS will return an Access Denied error message containing the internal IP address of the host.
Open a command prompt and change the current directory to cinetpubadminscripts or to where the adminscripts can be found. QID 86247 is PCI Fail according to PCI DSS v32 Requirement 137. In some cases IIS 70 server may be flagged as insecure by security scanning tools if internal IP address of the server is revealed.
If they are being used to track back-end servers for load balancing purposes then the addresses should be rewritten with innocuous identifiers from which an attacker cannot infer any useful information about the infrastructure. To prevent internal IP address disclosure take the following steps.