32113 : Mozilla Firefox SVG _cairo_pen_init Heap Overflow
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Timeline
Disclosure Date
2007-02-23

Description

A remote overflow exists in Mozilla Firefox. The application fails to validate input passed to the 'stroke-width' variable in the '_cairo_pen_init' function resulting in a heap overflow. With a specially crafted .svg file, an attacker can cause arbitrary code execution resulting in a loss of integrity.

Classification

 Location: Remote / Network Access
Attack Type: Input Manipulation
Impact: Loss of Integrity, Loss of Availability
Exploit: Exploit Public
Disclosure: OSVDB Verified, Vendor Verified

Technical

Firefox it's internal SVG viewer contains a buffer overflow when using a long value for the 'stroke-width' parameter. The below code can be used to demonstrate the vulnerability when using it in a SVG file format.

<clipPath stroke-width="2000000000000000" color="1" >
<line>
</line>
</clipPath>

Solution

Upgrade to Firefox 2.0.0.2 or higher, as it has been reported to fix this vulnerability. Additionally, disable Firefox's it internal SVG viewer as a workaround.

Products
Mozilla Organization
Watch-list
Firefox
Watch-list
 2.0
2.0.0.1

References

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Credit
  • Tom Ferris - tommysecurity-protocols.com - Security-Protocols

CVSSv2 Score

CVSSv2 Base Score = 9.3
Source: nvd.nist.gov | Generated: 2007-02-27 | Disagree?

Access_vector_2 Access_complexity_1 Authentication_2 Confidentiality_impact_2 Integrity_impact_2 Availability_impact_2

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