[NT] Multiple Remote Buffer Overruns Tomahawk' SteelArrow

From: support@securiteam.com
Date: 08/20/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Tue, 20 Aug 2002 10:50:59 +0200 (CEST)

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  Multiple Remote Buffer Overruns Tomahawk' SteelArrow
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SUMMARY

 <http://www.tomahawk.com/> SteelArrow is an easy to use Web Application
Server offering the latest in Internet connectivity and dynamic content
development. SteelArrow offers developers full web application development
functionality and fully tested run time reliability. SteelArrow operates
as an extension (on WinNT/2K) to Microsoft IIS, Apache, and Netscape
Enterprise servers. Multiple buffer overflows have been found in the
product allowing a remote attacker to execute arbitrary code on the remote
machine.

DETAILS

Buffer Overrun 1:
SteelArrow tracks user sessions with cookies in the form of
UserIdent=XXXXXXXXXXXX. By supplying an overly long value in the Cookie
HTTP header a buffer overflow occurs in the SteelArrow Service
(Steelarrow.exe) overwriting a saved return address on the stack.
SteelArrow, by default on Win2k/WinNT is installed as a system service.
Any arbitary code executed using this vulnerability will run with system
privileges.

Buffer Overrun 2:
By making an overly long request for an .ARO (extension used by
SteelArrow) file, an access violation occurs in DLLHOST.EXE
(Steelarrow.dll), again overwriting a saved return address on the stack.
Any code will execute in the security context of the IWAM account.

Buffer Overrun 3:
This issue is very similar to the Chunked Transfer-Encoding issue. By
making a request for an .ARO file an including a specific
Transfer-Encoding: Chunked request within the HTTP request header fields
and access violation occurs in DLLHOST.EXE due to a heap overflow. Again,
any arbitrary code execution will run in the context of the IWAM account.

Fix Information:
NGSSoftware alerted the vendor to these buffer overflow issues on the 1st
2nd and 3rd of April 2002. A fix is available from
<http://www.steelarrow.com> http://www.steelarrow.com.

ADDITIONAL INFORMATION

The information has been provided by <mailto:mark@ngssoftware.com> Mark
Litchfield of NGSSoftware Insight Security Research.

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