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securityvulnsSecurityvulnsSECURITYVULNS:DOC:11308
HistoryFeb 06, 2006 - 12:00 a.m.

[SA18740] Microsoft HTML Help Workshop ".hhp" Parsing Buffer Overflow

2006-02-0600:00:00
vulners.com
6

TITLE:
Microsoft HTML Help Workshop ".hhp" Parsing Buffer Overflow

SECUNIA ADVISORY ID:
SA18740

VERIFY ADVISORY:
http://secunia.com/advisories/18740/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Microsoft HTML Help Workshop 4.x
http://secunia.com/product/6967/

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

The vulnerability is caused due to a boundary error within the
handling of a ".hhp" file that contains an overly long string in the
"Contents file" field. This can be exploited to cause a stack-based
buffer overflow and allows arbitrary code execution when a malicious
".hhp" file is opened.

Note: An exploit is publicly available.

The vulnerability has been confirmed in version 4.74.8702.0. Other
versions may also be affected.

SOLUTION:
Do not open untrusted ".hhp" files.

PROVIDED AND/OR DISCOVERED BY:
bratax

ORIGINAL ADVISORY:
http://users.pandora.be/bratax/advisories/b008.html


About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/

Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.