Title: Microsoft IIS Internal IP Address Disclosure Vulnerability
Severity: MODERATE
Description:
When a remote user attempts to access an area protected by basic authentication with no realm defined, while specifying HTTP 1.0, Microsoft IIS will return an Access Denied error message containing the internal IP address of the host. Even if IIS is behind a firewall or NAT, it will disclose the true internal IP address to the remote user.
The internal IP address may also be revealed through a HTTP request made with an empty host name. If a PROPFIND HTTP request is made, the message returned will include the IP address as part of the HREF header. The IP address may also be exposed through the WRITE or MKCOL methods, although they would not normally be exposed to the external network.
Eg.
telnet target 80
Trying target...
Connected to target.
Escape character is '^]'.
HEAD /directory HTTP/1.0[CRLF]
[CRLF]
HTTP/1.1 401 Access Denied
WWW-Authenticate: Basic realm="<Internal IP Address>"
Content-Length: 644
Content-Type: text/html
Affected Products:
- Cisco Building Broadband Service Manager 5.0.0
- Cisco Call Manager 1.0.0
- Cisco Call Manager 2.0.0
- Cisco Call Manager 3.0.0
- Cisco ICS 7750
- Cisco IP/VC 3540 Video Rate Matching Module
- Cisco Unity Server 2.0.0
- Cisco Unity Server 2.2.0
- Cisco Unity Server 2.3.0
- Cisco Unity Server 2.4.0
- Cisco uOne 1.0.0
- Cisco uOne 2.0.0
- Cisco uOne 3.0.0
- Cisco uOne 4.0.0
- Microsoft BackOffice 4.0
- Microsoft BackOffice 4.5
- Microsoft IIS 2.0
- Microsoft IIS 3.0
- Microsoft IIS 4.0
- Microsoft IIS 4.0 alpha
- Microsoft IIS 5.0
- Microsoft IIS 5.1
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional
- Microsoft Windows 2000 Server
- Microsoft Windows NT 4.0
- Microsoft Windows NT 4.0 Option Pack
- Microsoft Windows XP 64-bit Edition
- Microsoft Windows XP 64-bit Edition SP1
- Microsoft Windows XP Professional
- Microsoft Windows XP Professional SP1
References:
- Dougal Campbell <dougal@GUNTERS.ORG>: IIS4 Basic authentication realm issue
- Microsoft: Q218180: IIS Returns IP Address in HTTP Header (Content-Location)
Juniper Networks provides this content via a wide variety of sources and production methods. If notified of errors or omissions in the content of this page, Juniper Networks, at its discretion, will modify or remove the page or leave the content as is, depending on various factors including but not limited to the reputation and authority of the party providing the notification. Please use the contact information displayed elsewhere on this page to report any errors or omissions regarding the content on this page.
