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Insecure Library Loading
Moderately critical

Microsoft Windows HyperTerminal Buffer Overflow Vulnerability

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Description


Brett Moore has reported a vulnerability in Microsoft Windows, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error in the HyperTerminal application when processing session files and telnet URLs. This can be exploited to cause a heap-based buffer overflow by tricking a user into opening a malicious HyperTerminal session file (.ht) or clicking a specially crafted telnet URL in a malicious e-mail or on a web site.

Successful exploitation allows execution of arbitrary code.

NOTE: Exploitation via a telnet URL requires that HyperTerminal is set as the default telnet client (not default setting).


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Brett Moore, Security-Assessment.com.

Original Advisory:
MS04-043 (KB873339):
http://www.microsoft.com/technet/security/bulletin/ms04-043.mspx

Security-Assessment.com:
http://www.security-assessment.com/Papers/Buffer_Overflow_In_HyperTerminal.pdf

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Microsoft Windows HyperTerminal Buffer Overflow Vulnerability

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