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Mozilla Firefox SVG viewer vulnerable to integer overflow

Vulnerability Note VU#551436

Original Release Date: 2007-02-25 | Last Revised: 2008-07-25


The Mozilla SVG viewer contains an integer overflow vulnerability. This vulnerability may allow an attacker to execute arbitrary code, or create a denial-of-service condition.


Scalable Vector Graphics (SVG) is an XML markup language for describing and displaying animated or static vector graphics. Mozilla Firefox includes a native SVG viewer, other Mozilla projects may use the Adobe SVG viewer.

The Mozilla SVG viewer fails to properly validate size parameters supplied to a memory allocation routine allowing an integer overflow to occur. This vulnerability could cause an undersized buffer to be allocated. When data is copied to that buffer, a heap-based buffer overflow may occur. An attacker may be able to exploit this vulnerability by convincing a user to go to a website that hosts a specially crafted SVG file.

This vulnerability occurred as a result of failing to comply with rule INT30-C of the CERT C Programming Language Secure Coding Standard.


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


See Mozilla Foundation Security Advisory 2007-01 for information about affected clients.

Disable SVG

Until updates can be applied, disabling SVG in Mozilla Firefox may mitigate this vulnerability. See the Mozilla about:config guide for information on how to disable SVG.

Vendor Information


Mozilla Affected

Updated:  February 25, 2007



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.


See for more details.

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

CVSS Metrics

Group Score Vector
Base 0 AV:--/AC:--/Au:--/C:--/I:--/A:--
Temporal 0 E:ND/RL:ND/RC:ND
Environmental 0 CDP:ND/TD:ND/CR:ND/IR:ND/AR:ND



Mozilla credits Tom Ferris for reporting this vulnerability.

This document was written by Ryan Giobbi.

Other Information

CVE IDs: CVE-2007-0776
Severity Metric: 22.23
Date Public: 2007-02-23
Date First Published: 2007-02-25
Date Last Updated: 2008-07-25 12:26 UTC
Document Revision: 71

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