HyperTerminal Buffer Overflow Vulnerability
USSR Advisory Code: USSR-2000055
Public Disclosure Date:
October 18, 2000
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.
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 2000: (can be applied to both Gold and Service Pack 1)
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