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https://issues.apache.org/jira/browse/PDFBOX-4623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17256975#comment-17256975
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Andreas Lehmkühler commented on PDFBOX-4623:
--------------------------------------------
I've found a fix for [^infinite-recursion.pdf]. [^loop_in_page_tree.pdf] and
[^poppler-43279-0.pdf] need a different fix therefore I've created a new
ticket for those issues. [^poppler-91414-1.zip-2.gz-53.pdf] doesn't trigger an
exception at all.
All I said is true for 3.0.0 and I'm afraid there won't be any fix for the
2.0.x-branch.
> COSParser: Infinite recursion
> -----------------------------
>
> Key: PDFBOX-4623
> URL: https://issues.apache.org/jira/browse/PDFBOX-4623
> Project: PDFBox
> Issue Type: Bug
> Components: Parsing
> Affects Versions: 2.0.16
> Environment: java version "12" 2019-03-19
> Java(TM) SE Runtime Environment (build 12+33)
> Java HotSpot(TM) 64-Bit Server VM (build 12+33, mixed mode, sharing)
> MacOS Mojave
> Reporter: Alex Rebert
> Assignee: Andreas Lehmkühler
> Priority: Minor
> Fix For: 3.0.0 PDFBox
>
> Attachments: infinite-recursion.pdf, loop_in_page_tree.pdf,
> poppler-43279-0.pdf, poppler-91414-1.zip-2.gz-53.pdf
>
>
> Parsing an invalid PDF can lead to an infinite recursion in COSParser, which
> results in a StackOverflowError.
> *Steps to repro*
> # Download malformed PDF (attached)
> # {{Run: java -jar pdfbox-app-2.0.16.jar ExtractText infinite-recursion.pdf}}
> *Stacktrace*
> {noformat}
> Exception in thread "main" java.lang.StackOverflowError [1005/1916]
> at java.base/sun.nio.cs.UTF_8.updatePositions(UTF_8.java:79)
> at java.base/sun.nio.cs.UTF_8$Decoder.xflow(UTF_8.java:210)
> at java.base/sun.nio.cs.UTF_8$Decoder.decodeArrayLoop(UTF_8.java:321)
> at java.base/sun.nio.cs.UTF_8$Decoder.decodeLoop(UTF_8.java:414)
> at java.base/java.nio.charset.CharsetDecoder.decode(CharsetDecoder.java:578)
> at java.base/java.nio.charset.CharsetDecoder.decode(CharsetDecoder.java:801)
> at org.apache.pdfbox.pdfparser.BaseParser.isValidUTF8(BaseParser.java:787)
> at org.apache.pdfbox.pdfparser.BaseParser.parseCOSName(BaseParser.java:768)
> at org.apache.pdfbox.pdfparser.BaseParser.parseDirObject(BaseParser.java:887)
> at
> org.apache.pdfbox.pdfparser.BaseParser.parseCOSDictionaryValue(BaseParser.java:154)
> at
> org.apache.pdfbox.pdfparser.BaseParser.parseCOSDictionaryNameValuePair(BaseParser.java:283)
> at
> org.apache.pdfbox.pdfparser.BaseParser.parseCOSDictionary(BaseParser.java:216)
> at org.apache.pdfbox.pdfparser.BaseParser.parseDirObject(BaseParser.java:867)
> at org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:912)
> at
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:881)
> at
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:801)
> at org.apache.pdfbox.pdfparser.COSParser.getLength(COSParser.java:1055)
> at org.apache.pdfbox.pdfparser.COSParser.parseCOSStream(COSParser.java:1114)
> at org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:920)
> at
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:881)
> at
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:801)
> at org.apache.pdfbox.pdfparser.COSParser.getLength(COSParser.java:1055)
> at org.apache.pdfbox.pdfparser.COSParser.parseCOSStream(COSParser.java:1114)
> at org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:920)
> at
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:881)
> at
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:801)
> at org.apache.pdfbox.pdfparser.COSParser.getLength(COSParser.java:1055)
> at org.apache.pdfbox.pdfparser.COSParser.parseCOSStream(COSParser.java:1114)
> at org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:920)
> at
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:881)
> at
> org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:801)
> at org.apache.pdfbox.pdfparser.COSParser.getLength(COSParser.java:1055)
> at org.apache.pdfbox.pdfparser.COSParser.parseCOSStream(COSParser.java:1114)
> ...
> {noformat}
> The file was generated by fuzzing and is (probably) not a valid PDF file.
>
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