[GitHub] [xerces-c] rouault opened a new pull request #2 4: ICUTranscoder::transcodeFrom(): fix read heap-buff er-overflow

GitBox <[email protected]> Tue, 10 Aug 2021 10:23:35 -0000

Newsgroups	gmane.text.xml.xerces-c.devel
Message-ID	<xerces-c.24.MDExOlB1bGxSZXF1ZXN0NzA3MjIzNjgz.gitbox@gitbox.apache.org>

rouault opened a new pull request #24:
URL: https://github.com/apache/xerces-c/pull/24


   Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35373
   
   When charsDecoded == 0, the line ``for (index = 0; index < charsDecoded
   - 1; index++)`` will cause to read out of bounds of fSrcOffsets, due to
   unsigned integer underflow rules.
   
   Can be verified with the attached (broken) XML file: [test.gml.zip](https://github.com/apache/xerces-c/files/6960822/test.gml.zip)
   


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