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TITLE:
Microsoft Help Workshop Two Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA23862

VERIFY ADVISORY:
http://secunia.com/advisories/23862/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Microsoft Help Workshop 4.x
http://secunia.com/product/13299/

DESCRIPTION:
porkythepig has discovered two vulnerabilities in Microsoft Help
Workshop, which can be exploited by malicious people to compromise a
user's system.

1) A boundary error when processing .CNT files can be exploited to
cause a stack-based buffer overflow via a specially crafted .CNT
file.

2) A boundary error when processing .HPJ files can be exploited to
cause a stack-based buffer overflow via a specially crafted .HPJ file
with an overly long string as the HLP value in the OPTIONS section.

Successful exploitation allows execution of arbitrary code.

The vulnerabilities are confirmed in version 4.03.0002. Other
versions may also be affected.

SOLUTION:
Do not open untrusted CNT or HPJ files.

PROVIDED AND/OR DISCOVERED BY:
porkythepig

ORIGINAL ADVISORY:
http://archives.neohapsis.com/archives/bugtraq/2007-01/0426.html
http://archives.neohapsis.com/archives/bugtraq/2007-01/0459.html

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