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xref loop causes qpdf to hang #149

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hannob opened this Issue Aug 24, 2017 · 2 comments

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@hannob @jberkenbilt
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hannob commented Aug 24, 2017

The attached file will cause an infinite loop in qpdf due to looping xref's.
loop.zip

This is actually an example from a six year old bug in evince, discovered by andreas bogk, see:
https://bugs.launchpad.net/ubuntu/+source/poppler/+bug/825554
https://github.com/andreas23/pdfparser/tree/master/tests
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jberkenbilt Aug 24, 2017

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Thanks. I can reproduce it. Sigh. This one shouldn't be too hard to fix as a special case. I wonder how many other things like this are lurking in qpdf.
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jberkenbilt commented Aug 24, 2017

Thanks. I can reproduce it. Sigh. This one shouldn't be too hard to fix as a special case. I wonder how many other things like this are lurking in qpdf.

@jberkenbilt jberkenbilt added bug next labels Aug 24, 2017

@jberkenbilt jberkenbilt closed this in 85f05cc Aug 26, 2017

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ghost Feb 14, 2018

This has been assigned CVE-2017-18186

ghost commented Feb 14, 2018

This has been assigned CVE-2017-18186
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