Apple iChat AIM URI handler format string vulnerability

Overview

Apple iChat contains a format string vulnerability. This vulnerability may allow a remote, unauthenticated attacker to execute arbitary code.

Description

The Apple iChat AIM URI handler fails to properly sanitize user-controlled data that is supplied to a formatted output function. This may allow a format string vulnerability to occur.

Depending on the user’s browser, an attacker may be able to exploit this vulnerability by persuading a user to access a specially crafted web page. Some web browsers, such as Safari, automatically launch iChat to handle certain types of URIs. So, if a Safari user accesses a web page containing a specially crafted URI, iChat will be launched to process that URI. This may trigger the vulnerability.

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Impact

A remote, unauthenticated attacker may be able to execute arbitrary code.

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Solution

Apply an update

Apple has addressed this issue with Apple Security Update 2007-002.

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Vendor Information

794752

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Apple Computer, Inc. __ Affected

Updated: February 16, 2007

Status

Affected

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.

Addendum

Refer to <http://docs.info.apple.com/article.html?artnum=305102&gt;.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23794752 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://projects.info-pull.com/moab/MOAB-20-01-2007.html&gt;
• <http://docs.info.apple.com/article.html?artnum=305102&gt;
• <http://secunia.com/advisories/24198/&gt;
• <http://securitytracker.com/alerts/2007/Feb/1017661.html&gt;
• <http://www.securityfocus.com/bid/22146&gt;

Acknowledgements

This vulnerability was publicly disclosed as part of the Month of Apple Bugs project.

This document was written by Jeff Gennari.

Other Information

CVE IDs:	CVE-2007-0021
Severity Metric:	11.85 Date Public: