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https://issues.apache.org/jira/browse/PDFBOX-6037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18009235#comment-18009235
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ASF subversion and git services commented on PDFBOX-6037:
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Commit 1927435 from Tilman Hausherr in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1927435 ]
PDFBOX-6037: avoid OOM, as suggested by David Justamante and Michael Klink
> Potential OOM in XrefStreamParser
> ---------------------------------
>
> Key: PDFBOX-6037
> URL: https://issues.apache.org/jira/browse/PDFBOX-6037
> Project: PDFBox
> Issue Type: Bug
> Components: Parsing
> Affects Versions: 4.0.0
> Reporter: David Justamante
> Priority: Minor
> Labels: patch
> Attachments: example.pdf, simple_patch.diff
>
>
> This issue is being _*manually*_ filed by the competition organizers. We
> recognize there is a number of AI generated submissions as of late. We have
> gone through the manual process of bug/patch validation to prevent
> unnecessary "noise", respecting maintainers' time.
> This submission is being sent as part of DARPA's AIxCC competition.
> ([https://aicyberchallenge.com)|https://aicyberchallenge.com)/] This issue
> was discovered by an autonomous Cyber Reasoning System (CRS) and validated by
> competition engineers. The patch was manually constructed by the competition
> engineers.
> XrefStreamParser - Read length then allocate without validation or bounds
> checking. This can cause OOM if heap is < 2g.
> We understand if this is a "won't fix" from an allocation perspective, but it
> feels like the allocation should happen after some verification that the
> stream is really there and really of that length.
> We're attaching a triggering file and an example simple patch that trivially
> sets a hard limit on the stream length. The example file was generated by
> competitor's system in the AIxCC competition.
> (AIxCC Internal: CHA-1725)
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