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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Infinite recursion at cairo-mesh-pattern-rasterizer.c:848"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101550">101550</a>
</td>
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<th>Summary</th>
<td>Infinite recursion at cairo-mesh-pattern-rasterizer.c:848
</td>
</tr>
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<th>Product</th>
<td>poppler
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>general
</td>
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<th>Assignee</th>
<td>poppler-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>foca@salesforce.com
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=132125" name="attach_132125" title="Proof of concept">attachment 132125</a> <a href="attachment.cgi?id=132125&action=edit" title="Proof of concept">[details]</a></span>
Proof of concept
Hi,
There is an infinite recursion in pdftocairo parsing the attached PoC1.pdf. As
a result of the infinite (or very deep) recursion all the stack space is
consumed and the application crashes.
The recursion happens at, cairo-mesh-pattern-rasterizer.c:848:
844 subc[2][i] = 0.5 * (c[0][i] + c[2][i]);
845 subc[3][i] = 0.5 * (c[1][i] + c[3][i]);
846 }
847
848 draw_bezier_patch (data, width, height, stride, first, subc);
849
850 for (i = 0; i < 4; ++i) {
851 subc[0][i] = subc[2][i];
852 subc[1][i] = subc[3][i];
This bug was found when using a poppler util, pdftocairo. A PoC is attached. To
reproduce the bug use:
pdftocairo -svg PoC1.pdf
This vulnerability has been found by Offensive Research at Salesforce.com:
Alberto Garcia (@algillera), Francisco Oca (@francisco_oca) & Suleman Ali
(@Salbei_)</pre>
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