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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 - poppler-0.44.0: stack overflow while rending with pdftohtml (3)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96027">96027</a>
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<th>Summary</th>
<td>poppler-0.44.0: stack overflow while rending with pdftohtml (3)
</td>
</tr>
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<th>Product</th>
<td>poppler
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>pdftohtml
</td>
</tr>
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<th>Assignee</th>
<td>poppler-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>legarrec.vincent@gmail.com
</td>
</tr></table>
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<pre>Hi, while fuzzing, pdftohtml crashes with invalid pdf (file enclosed) with
poppler-0.43.0 and poppler-0.44.0.
Libpoppler runs into infinity loop. I don't know if it's stack overflow but the
stack looks broken so probably.
Output :
…
Syntax Error (1712): Illegal character <2f> in hex string
Syntax Error (1713): Illegal character <49> in hex string
Syntax Error (1714): Illegal character <6e> in hex string
Syntax Error (1716): Illegal character <6f> in hex string
Syntax Error (1723): Illegal character <52> in hex string
Syntax Error (1725): Illegal character <2f> in hex string
Syntax Error (1726): Illegal character <49> in hex string
Syntax Error (1729): Illegal character <5b> in hex string
Syntax Error (1731): Illegal character <3c> in hex string
Syntax Error (1734): Illegal character <54> in hex string
Syntax Error (1764): Missing 'endstream' or incorrect stream length
Syntax Error (957): Dictionary key must be a name object
Syntax Error (959): Dictionary key must be a name object
gdb output :
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7a20fcd in gfree (p=0xbd4c60) at gmem.cc:289
289 if (p) {
(gdb) bt
#0 0x00007ffff7a20fcd in gfree (p=0xbd4c60) at gmem.cc:289
#1 0x00007ffff78874d8 in Object::free (this=0xbd2068) at Object.cc:158
#2 0xffffffffffd58ad0 in ?? ()
#3 0x0000000000000007 in ?? ()
#4 0x0000000000000007 in ?? ()
#5 0x0000000000bd4c60 in ?? ()
#6 0x0000000000000002 in ?? ()
#7 0x0000000000000000 in ?? ()</pre>
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