Mozilla may process content-defined setters on object prototypes with elevated privileges

Overview

Mozilla allows content-defined setters on object prototypes to execute with elevated privileges. This may allow a remote attacker to execute arbitrary code.

Description

Setters

A setter is a method in JavaScript that sets the value of a property.

The problem

The setters in Mozilla are called by privileged user interface (UI) code. This elevated privilege can be passed on to the content-provided JavaScript code. Mozilla Firefox and Thunderbird are reported to be vulnerable.

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Impact

The complete impact of this vulnerability is not yet known.

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Solution

Apply an update
Refer to Mozilla Foundation Security Advisory 2006-37 for fixed versions of Mozilla products.

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Disable JavaScript

This vulnerability can be mitigated by disabling JavaScript.

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Vendor Information

575969

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Mozilla, Inc. __ Affected

Updated: June 02, 2006

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

Please refer to Mozilla Foundation Security Advisory 2006-37.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23575969 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.mozilla.org/security/announce/2006/mfsa2006-37.html&gt;
• <https://bugzilla.mozilla.org/show_bug.cgi?id=330773&gt;
• <http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Guide:Creating_New_Objects:Defining_Getters_and_Setters&gt;
• <http://www.securityfocus.com/bid/18228&gt;

Acknowledgements

Thanks to the Mozilla Foundation Security Advisory for reporting this vulnerability, who in turn credit Paul Nickerson and moz_bug_r_a4.

This document was written by Will Dormann.

Other Information

CVE IDs:	CVE-2006-2776
Severity Metric:	11.48 Date Public: