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Treat corrupt JPEG streams as unfilterable

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m-holger 2024-07-04 15:08:11 +01:00
parent 598268f6ad
commit edf3509b78
3 changed files with 34 additions and 7 deletions
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35
ChangeLog
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@ -1,13 +1,38 @@
2024-07-04 M Holger <m.holger@qpdf.org>
* Treat corrupt JPEG streams as unfilterable. This avoids them
getting uncompressed when writing PDF files with decode level all.
2024-07-02 Jay Berkenbilt <ejb@ql.org>
* Add QPDF::setMaxWarnings to set the maximum of warnings before
warning suppression.
* Add additional options to Pl_DCT construction to limit sizes and
memory usage of compression. These are generally exposed but are
primarily intended to support fuzz tests, which have explicit
memory limits that are smaller than what is commonly seen in the
wild with PDF files.
* Add static option to Pl_DCT to limit memory usage of
decompression. The option is generally exposed but is primarily
intended to support fuzz tests, which have explicit memory limits
that are smaller than what is commonly seen in the wild with PDF
files.
* Add static option to Pl_DCT to control whether decompression of
corrupt JPEG data is attempted.
2024-06-29 M Holger <m.holger@qpdf.org>
* Bug fix: in QPDFOutlineObjectHelper detect loops in the list of
direct children of an outline item.
2024-06-27 M Holger <m.holger@qpdf.org>
* Add sanity check in QPDF xref table reconstruction to reject
objects with impossibly large object id in order to improve
handling of severely damaged PDF files.
2024-06-25 M Holger <m.holger@qpdf.org>
* Detect severely damaged PDF files early. After parsing the xref
table in QPDF throw a damagedPDF exception if the root of the pages
tree is not a dictionary.
2024-06-07 Jay Berkenbilt <ejb@ql.org>

4
include/qpdf/Pl_DCT.hh
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@ -39,7 +39,9 @@ class QPDF_DLL_CLASS Pl_DCT: public Pipeline
QPDF_DLL
static void setMemoryLimit(long limit);
// Treat corrupt data as a runtime error rather than attempting to decompress regardless.
// Treat corrupt data as a runtime error rather than attempting to decompress regardless. This
// is the qpdf default behaviour. To attempt to decompress corrupt data set 'treat_as_error' to
// false.
// NB This is a static option affecting all Pl_DCT instances.
QPDF_DLL
static void setThrowOnCorruptData(bool treat_as_error);

2
libqpdf/Pl_DCT.cc
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@ -22,7 +22,7 @@ namespace
};
long memory_limit{0};
bool throw_on_corrupt_data{false};
bool throw_on_corrupt_data{true};
} // namespace
static void