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Apple Help Viewer vulnerable to buffer overflow

Vulnerability Note VU#566875

Original Release Date: 2008-05-29 | Last Revised: 2008-05-29


A vulnerability in the way Apple Help Viewer handles specially crafted URLs may allow an attacker to execute arbitrary code or cause a denial of service.


According to Apple Security Update 2008-003:

    An integer underflow in Help Viewer's handling of help:topic URLs may result in a buffer overflow. Accessing a malicious help:topic URL may lead to an unexpected application termination or arbitrary code execution.

Note that this issue affects systems running Mac OS X prior to version 10.5.


A remote, unauthenticated attacker may be able to execute arbitrary code or cause a denial of service.


Apply Update
This issue is addressed in Apple Security Update 2008-003. An update for Mac OS X is available on Apple Downloads and via Software Update.

Vendor Information


Apple Computer, Inc. Affected

Updated:  May 29, 2008



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


Refer to Apple Security Update 2008-003 for more information.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CVSS Metrics

Group Score Vector



This issue was reported in Apple Security Update 2008-003. Apple credits Paul Haddad of PTH with reporting this issue.

This document was written by Chris Taschner.

Other Information

CVE IDs: CVE-2008-1034
Severity Metric: 8.68
Date Public: 2008-05-28
Date First Published: 2008-05-29
Date Last Updated: 2008-05-29 19:01 UTC
Document Revision: 6

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