HyperTerminal Buffer Overflow Vulnerability

HyperTerminal Buffer Overflow Vulnerability

USSR Advisory Code:  USSR-2000055

Public Disclosure Date:
October 18, 2000

Vendors Affected:

Microsoft Corporation

Hilgraeve, Inc.

Systems Affected:
HyperTerminal are installed by default on the following Microsoft Operating Systems
Microsoft Windows 2000 (all versions)
Microsoft Windows Me
Microsoft Windows 98 and Windows 98SE

The USSR Team has found a buffer overflow in the HyperTerminal telnet client, which 
is in the code that processes the Telnet URL's, that can enable an attacker to execute 
arbitrary code on another user's system. If a user opens an mail containing HTML and 
also contains a malformed Telnet URL a buffer overrun will enable the creator of the mail 
to cause arbitrary code to be runned on the user's system. 




More Information:


Microsoft Security Bulletin MS00-079: Frequently Asked Questions, 

Microsoft Knowledge Base articles Q274548 (Win9x) and Q276471 (Win2K) 
discuss this issue and will be available soon. 

A patch for HyperTerminal Private Edition (a for purchase upgrade from 
the default client) is available from: http://www.hilgraeve.com

Windows 98 and 98SE:


Windows Me:


Windows 2000: (can be applied to both Gold and Service Pack 1)


Related Links:

Underground Security Systems Research:

CrunchSp Product:


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