17342 : Microsoft ISA Server Basic Credentials Exposure
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Info

Last Modified

10 months ago

Percent Complete

100%

Disclosure

Jun 14, 2005

Discovery

Unknown

Dates

Exploit

Jun 14, 2005

Solution

Unknown

Description

Microsoft ISA Server contains a flaw that may lead to an unauthorized password exposure. It is possible to gain unauthorized access to Base64-encoded passwords when Basic authentication is configured on the "Incoming Web Requests" listener. If a Web publishing rule is configured for both "SSL required" and "User authentication" the ISA server will forward Basic authentication credentials of users to published web sites with HTTP instead of HTTPS. This may allow an attacker to monitor the communication and gain access to the unencrypted password.

Classification

Location: Local Access Required, Remote/Network Access Required
Attack Type: Cryptographic, Information Disclosure
Impact: Loss of Confidentiality
Exploit: Exploit Available
Disclosure: OSVDB Verified

Solution

Currently, there are no known workarounds or upgrades to correct this issue. However, Microsoft has released a patch to address this vulnerability.

Products

Microsoft Corporation
Watch-list
ISA Server
Watch-list
2000 SP2
Small Business Server
Watch-list
2003 Premium Edition
2000

References

Tools & Filters

Nessus

18487 18491

Credit

  • Han Valk -

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