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https://issues.apache.org/jira/browse/PDFBOX-6038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18009068#comment-18009068
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Tilman Hausherr edited comment on PDFBOX-6038 at 7/22/25 6:53 PM:
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I couldn't reproduce it (maybe my stack is bigger than yours) but it makes
sense to fix it. No, nesting isn't allowed.
was (Author: tilman):
I couldn't reproduce it (maybe my stack is bigger than yours) but it makes
sense. No, nesting isn't allowed.
> Potential StackOverflow in PDFStreamParser
> ------------------------------------------
>
> Key: PDFBOX-6038
> URL: https://issues.apache.org/jira/browse/PDFBOX-6038
> Project: PDFBox
> Issue Type: Bug
> Components: Parsing
> Affects Versions: 2.0.34, 3.0.5 PDFBox, 4.0.0
> Reporter: David Justamante
> Priority: Minor
> Labels: patch
> Fix For: 2.0.35, 3.0.6 PDFBox, 4.0.0
>
> Attachments: data.bin, 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) 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.
> BeginImage tags trigger recursion. If a stream has any number of {{BI}}
> greater than {{{}-Xss{}}}, then a StackOverflow is triggered.
> Triggering code:
> [https://github.com/google/oss-fuzz/blob/master/projects/pdfbox/project-parent/fuzz-targets/src/test/java/com/example/PDFStreamParserFuzzer.java#L39]
> The patch sets an arbitrary max depth. We didn't spend the time to determine
> if any recursion is allowed within an inline image.
> (AIxCC Internal: CHA-1728)
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