Mozilla Firefox SVG viewer vulnerable to integer overflow

Overview

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.

Description

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.

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Impact

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

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Solution

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

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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.

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Vendor Information

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Updated: February 25, 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

See <http://www.mozilla.org/security/announce/2007/mfsa2007-01.html&gt; for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23551436 Feedback>).

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

References

• <http://www.mozilla.org/security/announce/2007/mfsa2007-01.html&gt;
• <http://www.mozilla.org/projects/svg/&gt;
• <http://www.adobe.com/svg/&gt;
• <http://kb.mozillazine.org/Firefox_:_FAQs_:_About:config_Entries#Miscellaneous&gt;
• <http://en.wikipedia.org/wiki/Scalable_Vector_Graphics&gt;
• <http://www.w3.org/TR/SVG/painting.html#StrokeProperties&gt;
• <http://secunia.com/advisories/24238/&gt;
• <http://secunia.com/advisories/24287/&gt;
• <http://secunia.com/advisories/24205/&gt;
• <http://secunia.com/advisories/24290/&gt;
• <http://secunia.com/advisories/24252/&gt;
• <http://secunia.com/advisories/24320/&gt;
• <http://secunia.com/advisories/24328/&gt;
• <http://secunia.com/advisories/24293/&gt;
• <http://secunia.com/advisories/24327/&gt;
• <http://secunia.com/advisories/24343/&gt;
• <http://secunia.com/advisories/24333/&gt;
• <http://secunia.com/advisories/24393/&gt;
• <http://secunia.com/advisories/24352/&gt;
• <http://www.ciac.org/ciac/bulletins/r-164.shtml&gt;
• <http://secunia.com/advisories/24406/&gt;
• <http://secunia.com/advisories/24384/&gt;
• <http://secunia.com/advisories/24410/&gt;
• <http://secunia.com/advisories/24389/&gt;
• <http://secunia.com/advisories/24455/&gt;
• <http://secunia.com/advisories/24456/&gt;
• <http://secunia.com/advisories/24457/&gt;
• <http://www.securityfocus.com/bid/22694&gt;
• <http://secunia.com/advisories/24437/&gt;

Acknowledgements

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: