Microsoft Proxy 2.0 Internal Network Access Vulnerability

BID:1692

Info

Microsoft Proxy 2.0 Internal Network Access Vulnerability

Bugtraq ID: 1692
Class: Configuration Error
CVE:
Remote: Yes
Local: Yes
Published: Dec 17 1998 12:00AM
Updated: Dec 17 1998 12:00AM
Credit: Discovered by Mnemonix <[email protected]> on December 17, 1998.
Vulnerable: Microsoft Proxy Server 2.0
- Microsoft BackOffice 4.5
- Microsoft BackOffice 4.5
- Microsoft Windows NT 4.0
- Microsoft Windows NT 4.0
Not Vulnerable:

Discussion

Microsoft Proxy 2.0 Internal Network Access Vulnerability

It is possible to connect to an internal network protected by MS Proxy Server 2.0 via port 80 from an external source, even if all incoming connections through port 80 are disabled.

This can be achieved by setting up a host on the same IP subnet as the external interface card and performing the following GET request:

GET http://target:port/HTTP/1.0<enter><enter>

Exploit / POC

Microsoft Proxy 2.0 Internal Network Access Vulnerability

See discussion.

Solution / Fix

Microsoft Proxy 2.0 Internal Network Access Vulnerability

Solution:
Currently the SecurityFocus staff are not aware of any vendor supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected].

References

Microsoft Proxy 2.0 Internal Network Access Vulnerability

References:
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