Microsoft ISA Server HTTP/HTTPS Service Basic Auth Information Disclosure Vulnerability

BID:13955

Info

Microsoft ISA Server HTTP/HTTPS Service Basic Auth Information Disclosure Vulnerability

Bugtraq ID: 13955
Class: Design Error
CVE:
Remote: Yes
Local: No
Published: Jun 14 2005 12:00AM
Updated: Jun 14 2005 12:00AM
Credit: Discovery of this issue is credited to Han Valk.
Vulnerable: Microsoft ISA Server 2000 Enterprise Edition SP2
Microsoft ISA Server 2000 Enterprise Edition SP1
Microsoft ISA Server 2000 Enterprise Edition
Microsoft ISA Server 2000 SP2
+ Microsoft Small Business Server 2000 0
+ Microsoft Small Business Server 2003 Premium Edition
Microsoft ISA Server 2000 SP1
+ Microsoft Small Business Server 2000 0
+ Microsoft Small Business Server 2003 Premium Edition
- Microsoft Windows 2000 Advanced Server SP2
- Microsoft Windows 2000 Advanced Server SP1
- Microsoft Windows 2000 Datacenter Server SP2
- Microsoft Windows 2000 Datacenter Server SP1
- Microsoft Windows 2000 Server SP2
- Microsoft Windows 2000 Server SP1
Microsoft ISA Server 2000
+ Microsoft Small Business Server 2000 0
+ Microsoft Small Business Server 2003 Premium Edition
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Server
Not Vulnerable: Microsoft ISA Server 2004

Discussion

Microsoft ISA Server HTTP/HTTPS Service Basic Auth Information Disclosure Vulnerability

Microsoft Internet Security and Acceleration (ISA) server is prone to an information disclosure vulnerability. Reports indicate that the issue manifests when an ISA server is publishing a Web service that has Basic authentication enabled, but the Web publishing rules that process the request are configured as 'SSL required'.

An attacker that has the ability to intercept network communications between the ISA server and a client may leverage this issue to obtain Web site authentication credentials.

Exploit / POC

Microsoft ISA Server HTTP/HTTPS Service Basic Auth Information Disclosure Vulnerability

No exploit is required.

Solution / Fix

Microsoft ISA Server HTTP/HTTPS Service Basic Auth Information Disclosure Vulnerability

Solution:
Microsoft has released a fix to address this issue.


Microsoft ISA Server 2000 Enterprise Edition SP2

Microsoft ISA Server 2000 SP1

Microsoft ISA Server 2000

Microsoft ISA Server 2000 SP2

References

Microsoft ISA Server HTTP/HTTPS Service Basic Auth Information Disclosure Vulnerability

References:

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